We provide cell cycle and cell division practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on cell cycle and cell division skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.
List of cell cycle and cell division Questions
| Question No | Questions | Class |
|---|---|---|
| 1 | What number of mature egg cells are produced as a result of meiosis in humans? ( mathbf{A} cdot mathbf{1} ) B. 2 ( c cdot 3 ) D. 4 ( E ) | 11 |
| 2 | Nuclear membrane disappears in A. Late prophase B. Early prophase c. Metaphase D. Telophase | 11 |
| 3 | Fill in the blanks with appropriate words. In mitotic metaphase centromeres of chromosomes remain directed towards the ( ldots . . . . . . ) and the arms of chromosomes remain directed towards the | 11 |
| 4 | Terminalisation is related with A. Mitosiss B. Meiosiss c. Diakinesis D. Telophase | 11 |
| 5 | The drawing below shows a cell whose diplod chromosome number is four. this cell is in A. Metaphase B. Anaphase of mitosis c. First anaphase of meiosis D. Second anaphase of meiosis | 11 |
| 6 | Very Short Answer Types: Give a specific scientific term for each of the following. The period between two successive mitotic divisions. | 11 |
| 7 | is the most complicated and longest phase of meiotic division. A. Prophase I B. Prophase I c. Metaphase I D. Metaphase II | 11 |
| 8 | Cells at the end of prophase, when viewed under the microscope do not show A. Golgi bodies and ER B. Nucleolus and nuclear membrane c. Chromosome and cintromere D. More than one option is correct | 11 |
| 9 | Spindle usually persists in the form of during method of cytokinesis. A. phragmoplast, cleavage B. phragmoplast, cell plate c. cell plate, cell plate D. cell plate, cleavage | 11 |
| 10 | The DNA content of a diploid cell in the G1 phase of the cell cycle is measured If this DNA content is ( X ), then the DNA content of the same cell at metaphase of meiosis I would be ( A cdot 0.5 x ) B. 0.25 ( x ) ( c cdot x ) D. ( 2 x ) | 11 |
| 11 | The stage of cell cycle after DNA replication is ( A cdot G_{1} ) B. ( G_{2} ) ( c cdot s ) D. M E. Cytokinesis | 11 |
| 12 | In pachytene stage of meiosis, the chromosomes appear A. single stranded B. Double stranded c. Three stranded D. Four stranded | 11 |
| 13 | Which phase of mitosis is responsible for uncoiling of chromosomes followed by nuclear membrane formation? A. Interphase B. Prophase c. Metaphase D. Anaphase E. Telophase | 11 |
| 14 | Radioactive thymidine is fed to cells about to enter S-phase. It will make radioactive A. Euchromatin B. Heterochromatin c. Both A and B D. Neither euchromatin nor heterochromatin | 11 |
| 15 | What happens during telophase? A. Nuclear membrane is formed B. Nucleolus appears c. Astral rays disappear D. All of the above | 11 |
| 16 | Bouquet stage is observed in stage of the cell division. A. Leptotene B. Zygotene c. Diplotene D. Pachytene | 11 |
| 17 | Genes do not occur in pairs in A. Zygote B. Somatic cell C. Endosperm cells D. Gametes | 11 |
| 18 | During the meiotic division, the A. Homologous chromosomes are separated B. Linkage is disturbed C. Homologous chromosomes do not segregate D. All of the above | 11 |
| 19 | In Neurospora, the arrangement of ascospore after meiosis is found to be 2a : 4A : 2a. What can be concluded? A. First reductional then equational division B. First equational and then reductional division c. Both occur simultaneously | 11 |
| 20 | Leptotene chromosomes have A. two chromatids B. one chromatids c. four chromatids D. no chromatids | 11 |
| 21 | Choose the correct answers from the alternatives given : Synapsis is characteristic of A. leptotene B. zygotene c. pachytene D. diakinesis | 11 |
| 22 | is a point at which crossing over has taken place between homologous chromosomes. A. Chiasmata B. Synaptonemal complex c. centromeres D. Protein axes | 11 |
| 23 | Which of the following event takes place during diplotene stage of prophase I of meiosis? A. compaction of chromosomes B. Formation of synaptonemal complexes c. Formation of recombinational nodules D. Dissolution of synaptonemal complex | 11 |
| 24 | stage of cell division occurs after ( G_{2} ) phase A. Prophase B. Metaphase c. Anaphase D. Diakinesis | 11 |
| 25 | Choose the correct answers from the alternatives given : In a typical cell cycle, cytokinesis generally overlaps in time with which stage? A. Metaphase B. Anaphase c. Telophase D. Prophase | 11 |
| 26 | Synaptonemal complex is characteristic of A. Mitotic chromosomes B. Leptotene chromosomes c. Paired meiotic chromosomes D. Metaphase | 11 |
| 27 | Which process is important for the production of gametes in living organism performing sexual production in context with chromosomes? A. Unequal fission B. Meiosis c. Mitosis D. Multiple fission | 11 |
| 28 | A contractile mid-body forms during cytokinesis in A. Animal B. Higher plants c. Fungi D. Algae | 11 |
| 29 | Yeast complete cell cycle in A. 30 minutes B. 60 minutes c. 90 minutes D. 120 minutes | 11 |
| 30 | Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres A. Metaphase-II B. Anaphase- – c. Anaphase-II D. Metaphase- | 11 |
| 31 | Fill in the blanks with appropriate words. Synapsis, chiasma formation and crossing over occur between homologous chromosomes in of meiosis. | 11 |
| 32 | In meiosis, synapsis occurs during A. S-phase B. Interphase c. Metaphase D. Prophase 1 | 11 |
| 33 | An egg cell has 5 picogram of genetic material in its nucleus. What amount of material will be present in the organism at the end of ( G_{2} ) -phase of mitosis? A. ( 5 mathrm{gm} ) B. 5 picogram c. 10 picogram D. 20 picogram | 11 |
| 34 | The site of meiosis is A. VI B. I and VI c. ॥, ॥I, IV, and D. II, ( v ), and ( v ) I E. III and VI | 11 |
| 35 | In which phase of the cell cycle DNA doubles and chromosomes replicate? A. S period B. ( G_{1} ) phase ( mathrm{c} cdot G_{2} ) phase D. metaphase | 11 |
| 36 | State the following statements are true or false. In metaphase, the sister chromatids move towards the opposite poles of the spindle. A. True B. False | 11 |
| 37 | The M phase of cell cycle consist of ( A cdot G_{1}, S, ) and ( G_{2} ) phase B. Prophase, metaphase, anaphase, telophase c. Interphase, prophase, metaphase, anaphase, telophase D. Only prophase | 11 |
| 38 | The synthesis of proteins for formation of spindle fibres takes place in A. Gi phase B. s phase c. ( mathrm{G}_{2} ) phase D. M phase | 11 |
| 39 | In cell division, spindle fibres are made up of protein A. Myoglobin B. Tubulin c. Albumin D. Myosin | 11 |
| 40 | How meiosis differs from mitosis? | 11 |
| 41 | No. of meiotic divisions required for the formation of 200 seeds of Capsella will be? A . 200 в. 400 c. 250 D. 300 | 11 |
| 42 | In an organism, if the normal diploid number of chromosomes is ( 8, ) how many chromatids are present in each daughter cell at the end of meiosis I? ( A cdot 2 ) B. 4 ( c cdot 8 ) ( D cdot 16 ) | 11 |
| 43 | What is true about telophase stage of mitosis? A. Chromosomes lose their identity as discrete elements. B. Chromosomes cluster at opposite spindle poles. C . Nuclear envelope, nucleolus, Golgi complex and ER reform. D. All of these | 11 |
| 44 | A haploid cell doesn’t undergo A. Mitosis B. Meiosis c. ATP production D. DNA replication E. Transcription | 11 |
| 45 | Assertion Metaphase II begins with splitting of centromere of each chromosomes into two Reason In Anaphase II chromosomes align at the equator. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 11 |
| 46 | The chromosome exhibit high level of coiling at which phase of karyokinesis? A. Prophase B. Metaphase c. Telophase D. Interphase | 11 |
| 47 | A cell has four chromosomes, which are represented in the original cell drawing. At the end of meiosis I, the possible outcome is represented by A. I only B. II only c. III only D. IV only E. None of the above | 11 |
| 48 | Which of the following involves in formation of mitotic spindle? A . ca B. s c. мg D. | 11 |
| 49 | In which phase, proteins for spindle fibre formation are synthesized? A. Gi phase B. Ga phase c. s phase D. Anaphase | 11 |
| 50 | Each metaphasic plate in heterotypic division of meiosis contains half the number of diploid set of chromosomes. | 11 |
| 51 | In meiosis I, the centromere undergoes A. Division between anaphase a interphase B. Division between prophase and metap C. Division but the daughter chromosomes do not separate D. No division | 11 |
| 52 | A diploid cell which consist 46 chromosomes, than how many bivalant or tetrad found in Zygotene A . 46 B. 23 ( c cdot 92 ) D. None | 11 |
| 53 | In mitotic cell division A. Amount of DNA in the daughter cells will be equal to the parent cell B. Size will be half of the parent cell C. DNA will be double of the parent cell D. Both A and C | 11 |
| 54 | In which phase of meiosis-I the two chromosome can align at the metaphase plate independently of each other B. Metaphase- – c. Anaphase-I D. Telophase- | 11 |
| 55 | Which of the following phases correspond to the interval between mitosis and initiation of DNA replication A. S-Phase B. ( G_{1} ) -phase ( mathrm{c} cdot G_{2}- ) phase D. M-phase | 11 |
| 56 | In which stage of cell division, division of matrix of chromosome occurs? A. Late prophase B. Early metaphase c. Late metaphase D. Anaphase | 11 |
| 57 | Identify the correct order of phases for the cell cycle? I. ( G_{2} ) phase- growth and preparation for mitosis II. Mitosis III. ( G_{1} ) phase-cell growth IV.S phase – DNA copied V. Cytokinesis в. ॥॥, ।, IV, v, II c. ॥, ॥॥, ।, IV, v D. IV, III, 1, , I, v E. ( mathrm{V}, ) ॥I, IV, ।, । | 11 |
| 58 | In which stage DNA replication takes place? A. Metaphase B. ( G_{1} ) -phase c. ( S ) – phase D. ( G_{2} ) -phase | 11 |
| 59 | In animals, mitotic cell division is only seen in? A. Haploid somatic cells B. Diploid somatic cells c. Diploid meiocytes D. 1 and 3 | 11 |
| 60 | Which among the following is the correct sequence of prophase I of meiosis? A. Leptotene, pachytene, zygotene, diplotene, diakinesis B. Leptotene, diplotene, pachytene, zygotene, diakinesis c. Leptotene, zygotene, pachytene, diplotene, diakinessis D. Leptotene, zygotene, diakinesis, diplotene | 11 |
| 61 | Centrosomes occurs in A. Green plants B. Bacteria C. Animal cells D. All of the above | 11 |
| 62 | If a cell with 5 chromosome pairs undergoes mitosis, then what be the total number of chromosomes in its anaphase stage? A . 5 B. 10 c. 15 D. 20 | 11 |
| 63 | Reorganisation of genetic material or genetic recombination occurs during A. Metamorphosis B. Organogenesis c. Mitosiss D. Meiosis | 11 |
| 64 | Pick up the correct statements: (a) Mitosis occurs in somatic cells and meiosis in germ cells. (b) DNA replicates once in mitosis and twice in meiosis. (c) Mitosis and meiosis occur both in sexually and asexually reproducing organisms. A. a only B. b only c. c only D. a and b only E. b and conly | 11 |
| 65 | Choose the correct answer from the four options given below. Chromosomes get aligned at the centre of the cell during A. Metaphase B. Anaphase c. Prophase D. Telophase | 11 |
| 66 | Which one of the followings is wrong for meiosis? A. It leads to formation of sister chromatids B. It occurs in diploid cell c. It occurs in haploid cell D. It occurs by splitting of centromeres and separation of sister chromatids | 11 |
| 67 | Which one of the following precedes reformation of the nuclear envelope, during M phase of the cell cycle? A. Decondensation from chromosomes and reassembly of the nuclear lamina B. Transcription from chromosomes and reassembly of the nuclear lamina c. Formation of the contractile ring and formation of the phragmoplast D. Formation of the contractile ring and transcription from chromosomes | 11 |
| 68 | Division of nucleus is indirect in A. Mitosis B. Binary fission c. Budding D. Fragmentation | 11 |
| 69 | For the given diagram, a single chromosome is represented by part ( O ) ( A cdot A ) ( B . B ) ( c cdot c ) ( D cdot D ) ( E . E ) | 11 |
| 70 | If the DNA content in the sperm is ( 30 p g ) the what was the DNA content in its mother cell at the end of meiosis ( boldsymbol{I} ) A . 30 p в. 60 ря c. ( 120 p g ) D. 90 pg | 11 |
| 71 | Look at the given picture. Describe the changes in the nuclear material from stage ( A ) to stage ( B ) | 11 |
| 72 | Fill in the blanks with appropriate words. In meiotic division, prophase lis | 11 |
| 73 | Define Karyokinesis. | 11 |
| 74 | Which of the following structure will not be common to mitotic cell of a higher plant? A. Cell plate B. Centromere c. Centriole D. spindle fibre | 11 |
| 75 | Name the stage of mitosis in which chromosomes are arranged on the equator of spindle fibre. A. Anaphase B. Metaphase c. Prophase D. Telophase | 11 |
| 76 | Restorage of nucleocytoplasmic ratio is performed in ( mathbf{A} cdot G_{1} ) phase B. s phase ( mathrm{c} cdot G_{2} ) phase D. M phase | 11 |
| 77 | When cell has stalled DNA replication fork, which checkpoint should be predominantly activated? A. B. Both Ga M and M ( c cdot G_{1} / s ) ( D cdot G_{2} / M ) | 11 |
| 78 | In a prokaryotic cell, cell division takes place by ……………………….. type of reproduction | 11 |
| 79 | Out of the following options, which is the base to define the formation place of cell plate at the end of nuclear division? A. Microtubules B. Vesicles c. Endoplasmic reticulum D. Golgi body | 11 |
| 80 | Cell plate is referred as A . Germplast B. Idioblast c. Phragmoplast D. Middle lamella | 11 |
| 81 | Significance of mitosis is in A. Occurrence in every tissue of body B. Increasing cellular mass C. Swift division D. Producing cells genetically similar to parent cell | 11 |
| 82 | Which of the following is a correct comparison between mitosis and meiosis? A. Meiosis II resembles mitosis when sister chromatids split B. Both prophase of mitosis and meiosis include pairing up of homologous chromosomes C. In mitosis, aligning of maternal and paternal chromosomes can be random whereas, in meiosis, the alignment is fixed D. Replication of chromosomes occurs at the start of mitosis and meiosis during prophase | 11 |
| 83 | Compare between metaphase I and metaphase II of meiosis? | 11 |
| 84 | In which stage of meiosis, homologous chromosomes are segregated A. Metaphase I B. Anaphase I c. Anaphse II D. Metaphase II | 11 |
| 85 | Identify the stage of mitosis with its characteristics A. Metaphase – chromosomes moved to spindle equator, chromosomes made up of two chromatids B. Anaphase – Centromeres split, chromatids separate and start moving away c. Late Prophase – chromosomes move to spindle equator D. Metaphase – spindle fibers attached to kinetochores, centromeres split and chromatids separate | 11 |
| 86 | What would have been happened if any of the cells in nature had not been divided by meiosis? | 11 |
| 87 | Identify the following figure of cell cycle:- A. Anaphase I B. Metaphase c. Anaphase II D. Telophase II | 11 |
| 88 | You have studied mitosis in onion root tip cells. It has 14 chromosomes in each cell. Can you tell how many chromosomes will the cell have at ( G_{1} ) phase, after ( mathrm{S} ) phase, and after ( mathrm{M} ) phase? Also, what will be the DNA content of the cells at ( G_{1}, ) after ( S ) and at ( G_{2}, ) if the content after M phase is ( 2 C ? ) | 11 |
| 89 | Match the column I with column II and choose the correct option. Column Column a) Synaptonemal complex 1) Zygotene 2 b) Recombination nodules ( quad ) Pachytene c) Activation of recombinase 3 ) Diplotene enzyme 4) d) Termination of chiasmata ( A cdot a-1, b-2, c-3, d-4 ) B. a-1, b-2, c-4, d-3 ( c cdot a-1, b-4, c-2, d-3 ) D. ( a-1, b-3, c-2, d-4 ) | 11 |
| 90 | Congression is a phenomenon of A. Movement of sister chromatids towards the poles B. Pairing of homologous chromosomes C. Separation of paired chromosomes D. Bringing the chromosomes on equator of spindle apparatus | 11 |
| 91 | Write any two significance of meosis? How does anaphase of mitosis different from anaphase of meiosis | 11 |
| 92 | The undifferentiated cell of an animal has 64 chromatids in a metaphase. How many chromosomes will be present in the gametes if that animal A . 16 B. 8 ( c .64 ) D. 32 | 11 |
| 93 | Which among the following is the longest phase of cell cycle? A. Prophase B. Telophase ( c cdot G_{1} ) D. ( G_{2} ) | 11 |
| 94 | DNA replication occurs in which of the following stages? A. ( G_{0} ) and ( G_{1} ) B. ( G_{2} ) stage c. s stage D. Mitotic phase | 11 |
| 95 | Metaphase chromosome appears to be longitudinally divided into two identical parts known as This question has multiple correct options A. Sister chromosomes B. Satellites c. Daughter chromosomes D. sister chromatids | 11 |
| 96 | In cell cycle, during which phase, chromosomes are arranged in equatorial plate? A. Metaphase B. Anaphase c. Telophase D. Prophase | 11 |
| 97 | Choose the correct answers from the alternatives given : The period in mitosis in which daughter chromosomes separate from each other and get to opposite poles is known as A. interphase B. anaphase c. metaphase D. prophase | 11 |
| 98 | The important event of meiosis is the crossing over. It occurs during A. Leptotene B. Pachytene c. Diplotene D. zygotene | 11 |
| 99 | The diagram given represents a certain stage of mitosis: ( (i) ) Identify the stage of cell division. ( (i i) ) Name the parts labelled ( A ) And ( B ) ( (i i i) ) What is the unique feature observed in this stage? ( (i v) ) How many daughter cells formed from this type of cell division? | 11 |
| 100 | Write the differences between mitosis and meiosis. | 11 |
| 101 | During anaphase I of meiosis, A. Homologous chromosomes separate B. Non-homologous chromosomes separate C. Sister chromatide chromosomes separate D. Non-sister chromatids chromosomes separate | 11 |
| 102 | The formation of multivalent at meiosis in a diploid organism is due to. A. Inversion B. Deletion c. Monosomy D. Reciprocal translocation | 11 |
| 103 | The amount of DNA per cell remains the same during A. ( s, ) G2 and metaphase B. G2, M phase c. Anaphase, Telophase, Gı phase ( D cdot(A) ) and ( (c) ) | 11 |
| 104 | Identify phase in mitosis shown by : centromeres split and thereby sister chromatids of each chromosome separates and they are pulled apart in opposite direction. A. Telophase B. Prophase c. Metaphase D. Anaphase | 11 |
| 105 | Distinguish between anaphase of mitosis and anaphase I of meiosis. | 11 |
| 106 | In which stage, the centromere lie at equator and arms are directed towards poles? A. Metaphase of mitosis B. Metaphase c. Metaphase II D. Both A and C | 11 |
| 107 | Short / Long Answer Type Questions: How meiosis differs from mitosis? In which plant organ both divisions can be studied? | 11 |
| 108 | An identical sister chromatids are present at I. Beginning of prophase II. Beginning of metaphase I III. End of telophase I A. I only B. II only c. ॥ only D. I and II E. Il and III | 11 |
| 109 | Choose the correct answers from the alternatives given : A particular cell has half as much DNA as some of the other cells in a mitotically active tissue. The cell in question could be in A. metaphase B. prophase c. ( G_{1} ) D. ( G_{2} ) | 11 |
| 110 | Assertion G-phase is also called anaphase, as during this phase the cell stores ATP for cell division. Reason Cell produces structural and functional proteins. Cell’s metabolic rate is high and is controlled by the enzymes. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is incorrect but Reason is correct D. Both Assertion and Reason are incorrect | 11 |
| 111 | A parenchymatous cell has 20 units of DNA. It starts to divide mitotically How many units of DNA would it have during anaphase, and | 11 |
| 112 | Give one basic difference between cytokinesis in plant cells and animal cells. | 11 |
| 113 | Which of the following statement is incorrect about the cell cycle? A. It consists of mitosis and interphase B. The cell’s DNA replicates during G, phase C. A cell can remain in Gi phase for weeks or much longe D. Most proteins are formed throughout all subphases of interphase | 11 |
| 114 | Which of the following is unique to mitosis and not a part of meiosis? A. Homologous chromosomes behave independently B. Chromatids are separated during anaphase C. Homologous chromosomes pair and form bivalents D. Homologous chromosomes crossover | 11 |
| 115 | In meiosis I, the inter zonal fibers appear in which stage? A. Prophase I B. Metaphase c. Anaphase! D. Telophase I | 11 |
| 116 | Post mitotic gap phase and synthetic phase refers to? A. ( G_{2} ) and ( M ) B. ( G_{1} ) and ( s ) ( c cdot G_{2} ) and ( s ) D. ( operatorname{sand} G_{1} ) | 11 |
| 117 | Number of bivalent are 8 in prophase I. What is the number of chromosomes during anaphase II ? ( A cdot 8 ) B. 4 ( c cdot 16 ) D. 32 | 11 |
| 118 | List any two significance of meiosis? | 11 |
| 119 | Fill in the blanks with appropriate words. Strictly speaking interphase is a phase of ( ldots ldots . . . . ) metabolism. | 11 |
| 120 | Mitosis A. Leads to recombinant daughter cells B. Is a reduction division C. Leads to formation of parental type of daughter cells D. Occurs in gametes | 11 |
| 121 | In meiosis , replication of DNA occurs in A . Mesiosis I B. Meiosis II c. Between meiosis II and Meiosis D. Both meiosis I and Meiosis I | 11 |
| 122 | ..is the last phase of karyokinesis A . Metaphase B. Anaphase c. Telophase D. Late prophase | 11 |
| 123 | During cell division in apical meristem nuclear membrane reappears in A. Interphase B. Telophase c. Prophase D. S phase | 11 |
| 124 | Synaptonemal complex is formed during A. Meiosiss B. Amitosis c. Mitosiss D. cytokinesis | 11 |
| 125 | In tetrad, the number of non-cross over chromatids is normally A. Four B. Two c. one D. None of the above | 11 |
| 126 | Which type of cell division occurs in the gonads? A. Mitosis only B. Meiosiss c. Both A and B D. Amitosis and meiosis | 11 |
| 127 | At what phase of meiosis are homologous chromosomes separated? A. At prophase II B. At prophase c. At anaphase D. At anaphase II | 11 |
| 128 | Which cell is normally produced as a direct result of meiosis? A. A uterine cell having half the normal species number of chromosomes B. An egg having the full species number of chromosomes. C. A zygote having the full species number of chromosomes. D. A sperm having half the normal species number of chromosomes. | 11 |
| 129 | Segregation or Mendelian factors (no linkage, no crossing over) occurs during A. Anaphase! B. Anaphase II c. Diplotene D. Metaphase I | 11 |
| 130 | How many mitotic divisions are needed for a single cell to make 128 cells? A. 7 B. 14 ( c cdot 28 ) D. 32 | 11 |
| 131 | 35. Crossing-over occurs during (1) Leptotene (2) Zygotene (3) Pachytene (4) Diplotene | 11 |
| 132 | Separation of homologous chromosomes is called A. Dispersion B. Bivalent formation c. Disjunction D. crossing over | 11 |
| 133 | Arrange these figures in ascending order of cell divisions. ( A cdot C, D, A, B ) B. B, A, D, C c. ( A, B, C, D ) D. ( B, D, A, C ) | 11 |
| 134 | Chromosomal morphology (structure) is best observed at A. Prophase B. Metaphase c. Interphase D. Anaphase | 11 |
| 135 | The diagram given represents a stage during cell division. Study the same and answer the question that follow. Name the stage depicted in the diagram.What is the unique feature observed in this stage? | 11 |
| 136 | Meiosis is also called as haplosis as A. Meiosis occurs in haploid cell B. Meiosis nullify the effect of fertilization C. Meiosis reduce the number of chromosome to half D. None of the above | 11 |
| 137 | Homologous chromosomes separates in which of the following phase of meiosis? A. Metaphase! B. Metaphase II c. Anaphase! D. Anaphase II | 11 |
| 138 | Which of the following is called as a reduction division in the formation of new cells? A. Meiosiss B. Mitosis c. Cytokinesis D. None of the above | 11 |
| 139 | At what stage of the cell cycle, are histone proteins synthesized in a eukaryotic cell? A. During telophase B. During S phase C. During G stage of prophase D. During entire prophase | 11 |
| 140 | Four phases of cell cycle in sequence are A ( cdot G_{1} rightarrow S rightarrow G_{2} rightarrow M ) B . ( S rightarrow G_{1} rightarrow G_{2} rightarrow M ) ( mathbf{c} cdot G_{1} rightarrow G_{2} rightarrow S rightarrow M ) D. ( M rightarrow G_{1} rightarrow G_{2} rightarrow S ). | 11 |
| 141 | The cellular structure which disappear during mitosis is A. Plasma membrane B. Nuclear membrane c. Mitochondria D. Nuclear membrane and nucleolus | 11 |
| 142 | A cell divides in order to? A. Maintain size of nucleus B. Maintain bulk of cytoplasm C. Maintain balance between bulk of cytoplasm and nucleus D. Maintain size of chromosomes | 11 |
| 143 | What is ( G_{0} ) (quiescent phase) of cell cycle? | 11 |
| 144 | A set of genetic material for both daughter cells are provided by the replication of chromosomes at A. Mitosis B. Prophase c. cytokinesis D. Interphase E. Metaphase | 11 |
| 145 | The basic difference between mitosis and meiosis is that A. Homologous chromosomes form tetrads in mitosis but not in meiosis B. Homologous chromosomes form tetrads in meiosis but not in mitosis C. The nuclear membrane disappears in mitosis but not in meiosis D. A spindle forms in mitosis but not in meiosis E. A spindle forms in meiosis but not in mitosis | 11 |
| 146 | If a back cell take 20 min to divide ( & ) if with this rate it take 10 hrs. To fill a cup of cells. What time it will take to fill it half? | 11 |
| 147 | Which of the following is the most primitive type of mitosis? A. Amitosis B. Cryptomitosis c. Endomitosis D. zygotic mitosis | 11 |
| 148 | Karyokinesis differ from cytokinesis because it involves A. Division of cytoplasm B. Division of the nucleus and cytoplasm c. Division of the nucleus D. Division of the cell | 11 |
| 149 | In meiosis, A. A single nucleus gives rise to two identical daughter nuclei B. The daughter nuclei are genetically identical to the parent nucleus C. The centromeres separate at the onset of anaphase I D. Homologous chromosomes synapse in prophase I | 11 |
| 150 | DNA synthesis occurs in A. G-phase B. S-phase c. ( G_{2} ) phase D. M phase | 11 |
| 151 | Which one of the following statements is/are not true for meiosis? A. It occur in reproductive tissue only B. Chromosome undergo pairing in early prophase c. chromosome do not exchange their segments D. centromere do not divide during anaphase | 11 |
| 152 | Length of chromosome/ chromatid to increase in A. Anaphase B. Prophase c. Metaphase D. Telophase | 11 |
| 153 | Differentiate between: Mitosis and.meiosis II | 11 |
| 154 | The various phases of the cell cycle will be affected by limiting growth factors like A. Sufficient nucleotides B. Temperature c. Nutrients D. All of the above | 11 |
| 155 | Which phase comes in between the G1 and G2 phases of cell cycle? A. M-phase B. Go phase c. s-phase D. Interphase | 11 |
| 156 | Meiosis and mitosis differ from each other because in meiosis A. The four nuclei formed are not similar to parental ones B. Homologous chromosomes pair exchange parts C. Number of chromosomes gets halved D. All of the above | 11 |
| 157 | Very Short Answer Types: In which phase, there is an active synthesis of RNA and proteins and no change in DNA contents of the cell? | 11 |
| 158 | During the first metaphase of meiosis, the centromeres A. Undergo division B. Do not divide c. Divide but do not separate D. Are not identical | 11 |
| 159 | Choose the correct answers from the alternatives given : In the meiotic cell division four daughter cells are produced by two successive divisions in which A. first division is equational and second is reductional B. first division is reductional and second is equational c. both divisions are reductional D. both divisions are equational | 11 |
| 160 | Which of the event listed below is not observed during mitosis? A. Chromatin condensation B. Movement of centrioles to opposite poles c. Appearance of chromosomes with two chromatids joined together at the centromere D. crossing over | 11 |
| 161 | Select the correct option: Four different steps that occur during meiosis are given in the following list. (i) Complete separation of chromatids (ii) Pairing of homologous chromosomes (iii) Lining up of paired chromosomes on equator (iv) Crossing over between chromatids Select the correct sequential arrangement of the steps. A ( . ) (ii), (iii), (iv), (i) B. (iii), (ii), (iv), (i) ( c cdot(text { ii) }, ) (iv), (iii), (i) D. (iii), (i), (ii), (iv) | 11 |
| 162 | During mitosis, metaphase differs from anaphase in having A. Same number of chromosomes and half number of chromatids B. Half number of chromosomes and half number of chromatids c. Half number of chromosomes and same number of chromatids D. Same number of chromosomes and same number of chromatids | 11 |
| 163 | Splitting pf centromere and hence separation of chromatids occurs during A. prophase-II B. anaphase- – c. anaphase -II D. metaphase-I | 11 |
| 164 | Most organelles show duplication in cell cycle during A ( cdot G_{1} ) – phase B. ( G_{0} ) – phase c. ( S ) -phase D. ( G_{2} ) – phase | 11 |
| 165 | Define cell cycle? | 11 |
| 166 | Name the two types of cytokinesis. | 11 |
| 167 | Choose the correct answers from the alternatives given : Chromosomes are in their most extended form during: A. interphase B. anaphase c. metaphase D. prophase | 11 |
| 168 | Arrange the following events of meiosis in the correct sequence. (i) Crossing over (ii) Synapsis (iii) Terminalization of chiasma (iv) The disappearance of the nucleolus. A ( cdot(i i),(i) .(i v) .(i i i) ) B. ( (i i),(i) .(i i i) .(i) ) c. ( (i),(i i) .(i i i) .(i v) ) D. ( (i i),(i i i) . .(i v) . . i i) ) | 11 |
| 169 | The function of meiosis I is to separate A. Homologous chromosomes B. Parental chromosomes c. sister chromatids D. cross overs | 11 |
| 170 | Number of DNA molecules in a metaphase chromosome is A. Many B. Three c. one D. Two | 11 |
| 171 | What is cell division? Write two types of cell division? | 11 |
| 172 | In somatic cell cycle A. A short interphase is followed by a long mitotic phase B. DNA replication takes place in S phase ( mathrm{C} cdot ln mathrm{G}_{1} ) phase, DNA content is double the amount of DNA present in the original cell D. None of these | 11 |
| 173 | The number of chromosomes in a somatic cell, of a diploid organism (with original of 10 pairs), after DNA replication and before mitosis would be A . 10 B. 20 c. 30 D. 40 E . 50 | 11 |
| 174 | Meiosis is significant in terms of evolution because it results in A. Genetically similar daughters B. Four daughter cells c. Eggs and sperms D. Recombinations | 11 |
| 175 | Which one of the organelles is responsible for the formation of aster in cell division? A. Chromosome B. Lysosome c. Ribosome D. centrosome | 11 |
| 176 | Which of the following phenomena is represented by the diagram? A. Linkage B. Independent assortment c. crossing over D. Non disjunction E. Mutation | 11 |
| 177 | ( G_{2} ) phase occurs between ( A cdot G_{1} ) and ( S ) B. ( M ) and ( s ) c. s and M D. ( G_{1} ) and ( M ) | 11 |
| 178 | The significance of meiosis is that it A. Produce four cells having chromosomal number equal to mother cell. B. Occurs in all types of cells. c. Maintains the constant chromosomes number of a particular species. D. Growth of animal body organs. | 11 |
| 179 | Mitosis can be studied in A. Onion root trip B. Garlic root tip c. Tendril tip D. All the above | 11 |
| 180 | Shape of chromosome can be best observed during A. Prophase B. Metaphase c. Anaphase D. Telophase | 11 |
| 181 | A human T lymphocyte in the mitotic metaphase stage will contain how many DNA molecules (exclude the DNA of mitochondria)? A . 23 B. 46 ( c cdot 184 ) D. 92 | 11 |
| 182 | In S-phase of the cell cycle A. Amount of DNA doubles in each cell B. Amount of DNA remains same in each cell c. Chromosome number is increased D. Amount of DNA is reduced to half in each cell | 11 |
| 183 | A host cell has intracellular bacterial symbionts. If growth rate of the bacterial symbiont is ( 10 % ) higher than the host cell, after ten generations of the host cell, the density of bacteria is host cell will increase: A . By 10% B. Two fold c. Ten fold D. Hundred fold | 11 |
| 184 | Pick up the correct statement: (a) Synapsis of homologous chromosomes occurs during prophase I (b) Division of centromeres takes place during anaphase I (c) Spindle fibres disappear completely in telophase of mitosis. (d) Nucleoli may reappear in telophase A . a only B. conly c. a and bonly D. a, c and d only | 11 |
| 185 | During which stage of prophase I, genetic recombination of parental characters, takes place? A. Zygotene B. Pachytene c. Diplotene D. Diakinesis | 11 |
| 186 | Chromosome start separating at which stage of mitosis? A. Early metaphase B. Late metaphase c. Early anaphase D. Early telophase | 11 |
| 187 | The synaptonemal complex first appears at A. Leptotene B. Pachytene c. zygotene D. Diplotene | 11 |
| 188 | The synthesis of RNA and protein takes place in which phase of the cell cycle? A. S phase B. M phase c. ( G_{1} ) and ( G_{2} ) phase D. None of the above | 11 |
| 189 | ( V, J ) and ( L ) shaped chromosome occur in which of the following? A. Prophase B. Anaphase c. Metaphase D. Telophase | 11 |
| 190 | In Meiosis, the chromosome number in the daughter cells are reduced to half that of their parent cells. Guess, what would happen, if the reduction of chromosome number is not done? | 11 |
| 191 | What accounts for (1) the genetic similarity between daughter cells and the parent cell following mitosis, and (2) the genetic dissimilarity between daughter cells and the parent cell following meiosis? | 11 |
| 192 | List the main difference between mitosis and meiosis. | 11 |
| 193 | Which is unique to meiosis and does not occur in mitosis? A. Homologous chromosomes cross over B. Homologous chromosomes pair and form bivalents C. Homologous chromosomes behave independently D. Chromatids are separated during anaphase | 11 |
| 194 | HeLa cells used for the study of cell division, are A. Human skin cancer cells B. Human uterine cancer cells c. Human heart cells D. Rat uterine cancer cells | 11 |
| 195 | Equatorial plate is found in which of the following stages? A. Metaphase B. Prophase c. Telophase D. Anaphase | 11 |
| 196 | Assertion Some cells enter ( G_{0} ) phase leading to inactivation of cell cycle. Reason ( G_{0} ) phase occurs due to non-availability of mitogen and energy rich compounds. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 11 |
| 197 | After mitosis, the chromosome number of a daughter cell is ( ldots ldots ldots ) that of the parent cells A. Doubled compared to B. One-half c. The same as D. Rearranged compared to | 11 |
| 198 | The correct sequence of occurrence of the given stages of mitosis is A. II, IV, VI, I, V, III B. ( |, ) ।V, ( vee ), ।, VI, II c. ॥, ( v, ) ।V, VI, ।, ॥ा D. III, VI, V, I, IV, II E . ( | ) II, IV, ( vee ), VI, I, । | 11 |
| 199 | At the metaphase plate during metaphase I of meiosis, there are A. single chromosomes B. always twenty-three chromosomes c. bivalents D. unpaired duplicated chromosomes | 11 |
| 200 | In a mammalian cell the longest and the most active phase of the cell cycle is A. Sphase B. ( G_{1} ) Phase c. ( G_{2} ) Phase D. None of these | 11 |
| 201 | is the longest stage of meiotic division. A. Prophase B. Metaphase c. Anaphase D. Telophase | 11 |
| 202 | What is the function of enzyme recombinase during meiosis A. Formation of synaptonemal complex B. Crossing over between nonsister chromatids c. condensation of chromosomes D. Alignment of bivalent chromosomes O equatorial plate | 11 |
| 203 | What is the significance of meiosis? How does meiosis differ from mitosis? | 11 |
| 204 | As compared to mitosis, meiosis has A. No telophase B. Exchange of chromatid segments C. Duplication of chromosomes during anaphase D. Daughter cells similar to parent cells | 11 |
| 205 | In mitosis, the spindle is A. Bipolar B. Multipolar c. Apolar D. Random | 11 |
| 206 | The process of crossing over between homologous chromosomes that takes place during meiosis is advantageous because it A. Makes for healthy offspring B. Provides a source of genetic variation c. Creates a random mix of chromosomes D. Allows gametes to have half the number of chromosomes E. Increases the number of gametes | 11 |
| 207 | Crossing over takes place in A. Prophase B. Metaphase c. Anaphase D. Prophase I | 11 |
| 208 | Very Short Answer Types: Give a specific scientific term for each of the following. Phase in the cell cycle when protein and RNA are synthesized. | 11 |
| 209 | Each chromosome composed of one chromatid in A. Anaphase! c. Metaphase! D. Metaphase II | 11 |
| 210 | Distinguish between metaphase of mitosis and metaphase I of meiosis. | 11 |
| 211 | ( mathrm{G}_{2} ) phase takes A. ( 50 % ) time of cell cycle B. 25 to 33% time of cell cycle c. 12 to ( 22 % ) time of cell cycle D. ( 4 % ) time of cell cycle | 11 |
| 212 | Division of cytoplasm is called A. Karyokinesis B. crossing over c. cytokinesis D. Kinesiss | 11 |
| 213 | The terminalization process starts in A. Leptotene B. Zygotene c. Diplotene D. Diakinesis | 11 |
| 214 | If the ( n=16 ) in plant cell than what is possible in metaphase I of meiosis? A. 32 bivalents B. 16 tetravalents c. 16 bivalents D. 32 tetravalents | 11 |
| 215 | Cell division is tightly regulated, which of the following is true regarding mitosis or meiosis. I. Mitosis shows no homologous pairing. II. There is no S phase between meiosis and II III. Meiosis centromeres do not divide at anaphase I. A. I and III only B. I and II only c. ॥ only D. I, II and III | 11 |
| 216 | ( mathrm{G}_{1}, mathrm{G}_{2} ) and ( mathrm{S} ) phases are seen in which phase of cell cycle? A. Metaphase B. Prophase c. Anaphase D. Interphase | 11 |
| 217 | In which phase does the spindle fiber disappear A. Prophase B. Metaphase c. Anaphase D. Telophase | 11 |
| 218 | Match the terms to these definitions. Centromere, centrosome, chromatin, hromosome, spindle, cell cycle, karyot ype, meiosis, mitosis, sister chromatids, interphase, metaphase The period from the end of one division of a, cell to the end of the next division. | 11 |
| 219 | Statement A: For a particular character in an individual, each gamete gets only one allele. Statement B: Chromatids of a chromosome split (separate) and move towards opposite poles during anaphase of mitosis. A. Both the statements are correct and ( B ) is the reason fo ( A ) B. Both the statements are correct and B is not the reason for ( A ) c. statement A is correct and statement B is wrong. D. statement B is correct and statement A is wrong | 11 |
| 220 | If a stock has ( 2 n=48 ) and scion microspore cell has ( 2 n=24 ) then root cell and the microspores will have how many chromosomes respectively? ( A cdot 12,48 ) B. 48, 12 c. ( 24, ) 12 D. 24, 96 | 11 |
| 221 | In mitosis, chromosome duplication occurs during A. Interphase B. Prophase c. Late prophase D. Late telophase | 11 |
| 222 | Assertion ( G_{1} ) phase is the interval between mitosis and initiation of DNA replication Reason The cell is metabolically inactive during ( G_{1} ) phase. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 11 |
| 223 | Who coined the term meiosis? A. Hertwig and Van Bevedin B. Sutton and Boveri C. Hofmeister and Waldeyer D. Farmer and Moore | 11 |
| 224 | Mitosis usually results in the production of diploid daughter cells with identical genetic complement. | 11 |
| 225 | The synaptonemal complex appears Between homologous chromosomes In the zygotene stage Composed of DNA + protein Before the pachytene stage A . 1 and 2 B. 1,3 and 4 c. 2,3 and 4 D. 1,2,3 and 4 | 11 |
| 226 | The longest phase of mitosis is A. Prophase B. Metaphase c. Anaphase D. Telophase | 11 |
| 227 | The number of tetrads present in pachytene and Metaphase-I of Allium cepa respectively A. 16 and 8 B. 16 and 16 ( c .8 ) and 8 D. 16 and 32 | 11 |
| 228 | Homologous chromosomes segregate during A. Fertilization B. Meiosis I c. Meiosis II D. Mitosis | 11 |
| 229 | Identify the stage of cell division. A. Prophase II of meiosis B. Both prophase and metaphase of mitosis C. Prophse I during meiosis D. Prophase of mitosis | 11 |
| 230 | During cytokinesis in plants, which of the following secretes the middle lamella? A. Golgi body B. SER c. RER D. Lysosomes | 11 |
| 231 | During which stage of the cell cycle is cell growth and replication of organelles most significant? A. M phase B. ( G_{1} ) phase ( mathrm{c} cdot G_{2} ) phase D. S phase | 11 |
| 232 | In which stage of meiosis the structures, number and shape of chromosomes can be observed? A. Prophase I B. Metaphase c. Anaphase! D. Telophase I | 11 |
| 233 | At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles? A. Metaphase- B. Metaphase-I c. Anaphase-I D. Anaphase-II | 11 |
| 234 | The complex formed by a pair of synapsed chromosomes is called as A. Kinetochore B. Bivalent c. Axoneme D. Equatorial plate | 11 |
| 235 | Human being are different in their colour size etc but yet they belong to same species. Explain. | 11 |
| 236 | The diagram represents the cell cycle. Compared to a cell in the ( mathrm{G}_{2} ) phase, ( mathrm{a} ) cell in the ( G_{1} ) phase has A. Twice as much DNA B. Half as much DNAA C. Twice as many centromeres D. Half as many centromeres E. Twice as many chromosomes | 11 |
| 237 | The distribution of genetic material occurs from generation to generation and permits great genetic diversity by frequent re-organisation of genetic complement. This occurs during A. Mitosis B. Meiosiss c. organogenesis D. Metamorphosis | 11 |
| 238 | Spindles are arrested by colchicine at A. Anaphase B. Metaphase c. Telophase D. Prophase | 11 |
| 239 | The enzyme recombinase is required at which stage of meiosis? A. Pachytene B. Zygotene c. Diplotene D. Diakinesis | 11 |
| 240 | Disjunction is A. Chromosome separition during interphase B. Chromosome separation during prophas I C. Chromosome separation in anaphase I D. Chromosome separation duri metaphase | 11 |
| 241 | Name the process where cytoplasmic material is divided into daughter cells. A. Cell division B. Cytokinesis c. Karyokinesis D. All of the above | 11 |
| 242 | The correct statement for significance of mitosis is A. Equal distribution of chromosomes B. Restoration of surface-volume ratio c. Maintenance of nucleoplasmic index D. All of the above | 11 |
| 243 | The chromosome replication occurs during A. s phase B. G_phase c. Metaphase D. Anaphase | 11 |
| 244 | Prophase is longer in A. Mitosiss B. Meiosis c. Equal in both D. Amitosis | 11 |
| 245 | During which phase of meiosis do homologous chromosomes separate? A. Anaphase B. Prophase c. Anaphase I D. Prophase II E. Metaphase! | 11 |
| 246 | How many mitotic divisions must occur in a cell of a root tip to form 256 cells? A . 256 B. 8 ( c cdot 128 ) ( D cdot 64 ) | 11 |
| 247 | What do you understand by cell cycle? | 11 |
| 248 | Which term best describes the nuclear material present during interphase? A. Chromosomes B. Chromatids c. Chromatin D. centromeres E. Centrioles | 11 |
| 249 | Define: a) Mitosis and b) Meiosis | 11 |
| 250 | What is the first phase of Mitiosis? Write the changes that take place in that stage. | 11 |
| 251 | How many tetrads are visible in a cell during pachytene stage of reduction division of there are 20 chromosomes in a meiocyte? A . 5 B. 10 c. 20 D. 40 | 11 |
| 252 | Karyoplasmic index (KI) is A ( cdot frac{V_{V}}{V_{n}-V_{c}} ) B. ( frac{V_{V}}{V_{c}-V_{n}} ) ( c cdot frac{V_{c}}{V_{n}} ) D. ( frac{V_{n}}{V_{n}+V_{c}} ) | 11 |
| 253 | Meiosis takes place in A. Meiocyte B. conidia c. Gemmule D. Megaspore | 11 |
| 254 | results in division of a cell into four cells. A. Mitosis B. Interphase c. Prophase D. Meiosis | 11 |
| 255 | Find odd one w.r.t meiotic cell cycle A. DNA replication occurs once only i.e., before Gap- 2 B. Karyokinesis occurs twice C. Reduction of ploidy at metaphase- D. Crossing over in tetrad stage | 11 |
| 256 | The process of mitosis can be studied in A. Onion root tip B. Garlic root tip c. Tendril tip D. All of the above | 11 |
| 257 | The chiasmata are formed as a result of A. Exchange of parts of paired homologus chromosome. B. Exchange of part of unpaired non-homologus chromosome. C. Duplication of parts of paired homologus o chromosome. D. Loss of parts of unpaired non-homologus chromosome. | 11 |
| 258 | Anaphase differs from metaphase in having A. Same number of chromosomes and half number of chromatids B. Half number of chromosomes and half number of chromatids C. Half number of chromosomes and same number of chromatids D. Same number of chromosomes and same number of chromatids | 11 |
| 259 | Differentiate between : Metaphase and anaphase of mitosis | 11 |
| 260 | Fill in the blanks with appropriate words. The cell cycle is divisible into two main phases ( ldots ldots ldots . . ) and | 11 |
| 261 | Define S phase and related events. | 11 |
| 262 | In what two ways is mitotic division in an animal cell different from the mitotic division in a plant cell? | 11 |
| 263 | The thick-thread stage occurs in A. Leptotene B. Zygotene c. Pachytene D. Diplotene | 11 |
| 264 | The nucleus of a diploid organism contains 3 ng of DNA in ( G_{1} ) phase. Which one of the following statements describes the state of the cell at the end of S phase? A. The nucleus divides into two, and each nucleus contains 3 ng of DNA. B. The nucleus does not divide, and it contains 3 ng of DNA. c. The nucleus divides into two, and each nucleus contains ( 1.5 mathrm{ng} ) of DNA D. The nucleus does not divide, and it contains 6 ng of DNA. | 11 |
| 265 | State the following statements are true or false. During ( G_{2} ) phase a cell contains double the amount of DNA (4n) present in the original diploid cell. | 11 |
| 266 | Which of the following structures are not observed in a cell at the end of prophase, when viewed under the microscope? A. Golgi complex B. Nucleolus c. Nuclear envelope D. All of the above | 11 |
| 267 | How many of the following are observed in the interphase nucleus? Chromatid, Nucleosome, Centriole, Nucleolus, Centromere, Kinetochore A . Three B. One c. Four D. Two | 11 |
| 268 | Terminalisation takes place during A. Pachytene B. Zygotene c. Leptotene D. Diakinesis | 11 |
| 269 | The phragmoplast is organised A. At the beginning of anaphase B. At the end of anaphase C. At the beginning of telophase D. At the end of telophase | 11 |
| 270 | What is Quiescent stage in cell division ( ? ) | 11 |
| 271 | If a parent cell has eight chromosomes, then the daughter cells following meiosis will have: A. four chromosomes B. sixteen chromosomes c. eight chromosomes D. any one of these | 11 |
| 272 | The diagram given represents a stage during cell division. Study the same and answer the question that follow. Name the type of cell division that occurs during. 1. Replacement of old leaves by new ones. 2. Formation of gametes. | 11 |
| 273 | Explain why mitosis is called equational and meiosis is called reductional division? | 11 |
| 274 | Cells in Go phase of cell cycle A. Exit cell cycle B. Enter cell cycle c. suspend cell cycle D. Terminate cell cycle | 11 |
| 275 | A cell that has 36 chromosomes, at the start of interphase will have at the conclusion of meiosis. A. 18 singular chromosomes B. 36 singular chromosomes c. 18 replicated chromosomes D. 9 chromosomes, one in each of the four gametes produced | 11 |
| 276 | The synthesis and storage of ATP molecules required for cell division takes place in A. Prophase B. G_phase c. Anaphase D. ( G_{2} ) phase | 11 |
| 277 | Name the stage of cell cycle at which one of the following events occurs. (i) Chromosomes are moved to spindle equator. (ii) Centromere splits and chromatids separate. (iii) Pairing between homologous chromosomes takes place (iv) Crossing over between homologous chromosomes takes place. | 11 |
| 278 | The longest stage of meiosis is A. Zygotene B. Diplotene c. Pachytene D. Diakinesis | 11 |
| 279 | The role of mitosis is not merely, to divide a cell into two daughter cells but to ensure genetic continuity, from one cell generation to another cell generation. The mechanism ensuring genetic continuity is A. Formation of cells with new chromosomes B. Formation of two daughter cells c. Formation of two cells with identical DNA D. Halving the chromosome number between the two new cells | 11 |
| 280 | Cytokinesis is followed by ( mathbf{A} . M ) phase B. ( G_{1} ) phase c. ( S ) phase D. ( G_{2} ) phase | 11 |
| 281 | Meiosis II fails after completion of meiosis I. This phenomenon A. Beachymeiosis B. Dinomitosis c. Karyokinesis D. Noni | 11 |
| 282 | At metaphase, chromosomes are attached to the spindle fibres by their A. Kinetochores B. Centromere c. Satellites D. Secondary constrictions | 11 |
| 283 | At which stage of meiosis the chromosome number reduces to half? A. Anaphase! B. Anaphase II c. Telophase I D. Telophase II | 11 |
| 284 | At the metaphase plate during metaphase II of meiosis, there are A. chromosomes consisting of one chromatid B. unpaired duplicated chromosomes c. bivalents (tetrads) D. homologous pairs. of chromosomes | 11 |
| 285 | In eukaryotic cell cycle, cell fusion experiments show that A. When an S phase cell is fused with a G_phase cell, ( G_{1} ) phase cell is stimulated to synthesize DNA B. When an S phase cell is fused with a Ga phase cell, DNA synthesis is induced in ( mathrm{G}_{2} ) phase cell C. When a Gi phase cell is fused with a Ga phase cell, DNA synthesis is induced in both ( mathrm{G}_{1} ) and ( mathrm{G}_{2} ) phase cells D. When a Gi phase cell is fused with an M phase cell both ( mathrm{G}_{1} ) and ( mathrm{M} ) phase cells are stimulated to synthesise DNA | 11 |
| 286 | Which of the following is the shortest phase of meiosis? A. Prophase B. Metaphase I c. Anaphase I D. Prophase II E. Metaphase II | 11 |
| 287 | A cell is destined to complete cell cycle A. When it enters post-mitiotic phase B. When it crosses restriction point C. Only when it crosses ( G_{0} ) check point D. When all check points are successfully crossed | 11 |
| 288 | is present between meiosis I and meiosis II. A. Interphse c. Interkinesis D. Telophase II | 11 |
| 289 | In onion root tip during metaphase stage of mitiosis the number of kinetochores will be – ( A cdot 4 ) B. 8 ( c cdot 16 ) D. 32 | 11 |
| 290 | Cross-like configurations when non- sister chromatids of a bivalent come in contact during first meiotic division are A. Chiasmata B. Chromomeres c. Centromere D. Bivalents | 11 |
| 291 | Which of the following is not a characteristic of meiosis? A. It involves two stages of DNA replication one before meiosis-I and another before meiosis-II. B. It involves recombination and crossing over. c. sister chromatids separate during anaphase-II D. Nuclear membrane disappears during prophase | 11 |
| 292 | Human cells in culture show a cell cycle to be completed in approximately A. 42 hours B. 24 hours c. 24 minutes D. 24 seconds | 11 |
| 293 | Name the following The stage at which centresome attaching the two chromatids divide. | 11 |
| 294 | The separation of two chromatids of each chromosome at early anaphase is initiated by A. The interaction of centromere with the chromosomal fibres B. The elongation of metaphasic spindle C. The force of repulsion between the dividend kinetochores D. All of the above | 11 |
| 295 | Calculate the number of chromatids if a cell has 20 bivalents in prophase I. A . 40 B. 80 c. 20 D. 60 | 11 |
| 296 | Identify the wrong statement about meiosis. A. Pairing of homologous chromosomes B. Four haploid cells are formed c. At the end of meiosis number of chromosomes are reduced to half D. Two cycle of DNA replication occur | 11 |
| 297 | A cell in mitotic prophase can be distinguished from a cell in meiotic prophase by? A. Formation of tetrad in a meiotic cell B. The terminalisation of chiasmata in late prophase of mitosis c. zipping in early prophase of mitosis D. Presence of only half as many chromosomes in the meiotic cell | 11 |
| 298 | Anastral mitosis can be traced in A. Invertebrates B. Vertebrates c. Both A and B D. Plant cells | 11 |
| 299 | Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the questions that below: How will you differentiate between mitosis and meiosis on the basis of the chromosome number in the daughter cells? | 11 |
| 300 | Nuclear spindle has ……….. types of fibres A. one B. Two c. Three D. Four | 11 |
| 301 | Assertion During anaphase, centromere of each chromosome splits to the chromatids separate. Reason During anaphase, chromatids move to opposite poles. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 11 |
| 302 | Which is synthesized in G_phase? A. DNA polymerase B. Histones c. Nucleolar DNA D. Tubulin protein | 11 |
| 303 | The metabolism of cell decreases during prophase again increases during which of the following phase? A. Telophase B. Anaphase c. Metaphase D. Gi phase | 11 |
| 304 | Assertion Crossing over leads to recombination of genetic material on the two chromosomes. Reason Crossing over is the exchange of genetic material between two homologous chromosomes. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 11 |
| 305 | The stages in proper sequence of prophase I are A. Diplotene ( rightarrow ) diakinesis ( rightarrow ) pachytene ( rightarrow ) zygotene ( rightarrow ) leptotene B. Leptotene ( rightarrow ) zygotene ( rightarrow ) pachytene ( rightarrow ) diplotene ( rightarrow ) diakinesis C. Leptotene ( rightarrow ) pachytene ( rightarrow ) zygotene ( rightarrow ) diakinesis ( rightarrow ) diplotene D. Zygotene ( rightarrow ) leptotene ( rightarrow ) pachytene ( rightarrow ) diakinesis ( rightarrow ) diplotene | 11 |
| 306 | An ovum of an animal has 2.5 pg of DNA in its nucleus. The amount of DNA at the end of ( mathrm{G}_{2} ) phase will be A. ( 2.5 mathrm{pg} ) B. 5 pg c. ( 250 mathrm{pg} ) D. ( 10 mathrm{pg} ) | 11 |
| 307 | Very Short Answer Types: In which phase, the synthesis of new DNA molecules takes place? | 11 |
| 308 | There is continuous multiplication in cell nuclei and all nuclei have same genetic information. The cell is undergoing A. Multiple rounds of karyokinesis, but no cytokinesis B. Multiple rounds of the M phase, but no rounds of the phase c. Multiple rounds of cytokinesis, but no rounds of karyokinesis D. Multiple rounds of the cell cycle, but no rounds of mitosis E. multiple rounds of the S phase, but no other phases of the cell cycle | 11 |
| 309 | In meiosis I, the centromere undergoes A. No division B. Division between prophase and metaphase C. Division between anaphase and interphase D. Division but the daughter chromosomes do not separate | 11 |
| 310 | Dyad is a pair of A. sister chromatide B. non-sister chromatids C. homologous chromosomes D. non-homologous chromosomes | 11 |
| 311 | Very Short Answer Types: In which phase of prophase I, crossing over takes place? | 11 |
| 312 | In onion root tip during mitotic metaphase, the number of kinetochores is ( A cdot 4 ) B. 64 ( c cdot 32 ) D. 16 | 11 |
| 313 | In mitosis, splitting of chromatids up to the centromere takes place in A. Prophase B. Metaphase c. Anaphase D. Telophase | 11 |
| 314 | The stage during which separation of the paired homologous chromosomes begins is A. Diakinesis B. Pachytene c. zygotene D. Diplotene | 11 |
| 315 | Diploid cells have A. Two chromosomes B. One set of chromosomes C. Two pairs of chromosomes D. Two sets of chromosomes | 11 |
| 316 | In which phase proteins for spindle fibre formation are synthesized? ( A cdot G_{1}- ) phase B. G_-phase c. s-phase D. Anaphase | 11 |
| 317 | The cytoplasm divides at A. Mitosis B. Prophase c. Cytokinesis D. Interphase E. Metaphase | 11 |
| 318 | Visible expression of the genetic phenomenon of crossing over is called A. Recombination B. Condensation c. chiasmata D. Spiralization | 11 |
| 319 | During cell cycle, RNA and proteins are synthesised in A. ( S ) – phase B. ( G_{1}- ) phase c. ( G_{2}- ) phase D. Both B and C | 11 |
| 320 | In which stage do chromosomes appear as thin long threads? A. Zygotene B. Pachytene C. Leptotene D. Prophose | 11 |
| 321 | Assertion Cell division is necessary because it is a physiological process bound to occur as a rule of nature. Reason Division of nucleus is followed by division of cytoplasm. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion. B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct | 11 |
| 322 | Best stage to observe shape, size and number of chromosomes is A. Interphase B. Metaphase c. Prophase D. Telophase | 11 |
| 323 | Spindle fibres are attached to kinetochores of chromosomes in? A. Metaphase B. Anaphase c. Telophase D. 1 and 2 | 11 |
| 324 | The diagram given represents a certain stage of mitosis. (i) Identify the stage of cell division. ( (i i) ) Name the parts labelled ( A ) and ( B ) (iiii) What is the unique feature observed in this stage? ( (i v) ) How many daughter cells formed from this type of cell division? | 11 |
| 325 | DNA replication occurs during A. Prophase B. Metaphase c. Cytokinesis D. Interphase E. Telophase | 11 |
| 326 | The DNA molecules of each chromosome replicates in A. Gi phase B. ( G_{2} ) phase c. s phase D. Mitotic phase | 11 |
| 327 | The number of chromatids, in a chromosome at anaphase is A. 2 in mitosis and 1 in meiosis B. 1 in mitosis and 2 in meiosis c. 2 each in mitosis and meiosis D. 2 in mitosis and 4 in meiosis | 11 |
| 328 | During which phase, the pulling apart of the chromosomes to the opposite poles of the cell take place? A. Interphase B. Prophase c. Metaphase D. Anaphase E. Telophase | 11 |
| 329 | The decision of cell division occurs at A. starting of ( G_{1} ) B. End of G ( _{1} ) c. Initial stage of prophase D. End of telophase | 11 |
| 330 | 56 cells are produced in meiosis in which A. First division is reductional B. First division is equational c. second division is reductional. D. None of the above | 11 |
| 331 | At which stage of mitosis, the two daughter chromatids separate from each other, migrate towards the opposite poles and are now referred to as chromosomes of the future daughter nuclei? A. Prophase B. Metaphase c. Anaphase D. Telophase | 11 |
| 332 | Which of the following is key event of anaphase of mitotic division? A. Chromosomes are moved to spindle equator and get aligned through spindle fibres to both poles B. Centromeres split and chromatids separate C. Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements D. Both (b) and (c) | 11 |
| 333 | What happens in synthesis phase during cell cycle? A. DNA synthesis B. Chromosome number becomes double c. Formation of two nuclei D. synthesis of proteins & RNA | 11 |
| 334 | In which stage of cell cycle, DNA replication occurs? A. Gi phase B. s phase c. ( mathrm{G}_{2} ) phase D. M phase | 11 |
| 335 | What is the significance of meiosis? A. Maternal and paternal genes are exchanged B. Leads to variation C. Both A and B D. similar offsprings | 11 |
| 336 | Discuss with your teacher about (i) Haploid insects and lower plants where cell-division occurs and (ii) Some haploid cells in higher plants where cell-division does not occur? | 11 |
| 337 | Select the correct option: A cell’s division time is 1 minute In 20 minutes, a culture tube (culture medium) is ( 1 / 8^{t h} ) filled with cells, When the tube will be fully filled? A . 21 minutes B. 23 minutes c. 60 minutes D. 160 minutes | 11 |
| 338 | The diagram represents a stage during cell division. Answer the following. i. Name the parts labelled 1,2 i. Identify the above stage and give a reason to support your answer. iii. Mention where in the body this type of cell division occurs. iv. Name the stage prior to this stage and draw a diagram to represent the same v. Give any two difference between mitosis and meiosis. | 11 |
| 339 | Refer to the following statements describing Prophase I of meiosis and answer the question (i) Thin thread like chromosomes with a beaded appearance (ii) Appearence of recombination nodules (iii) Formation of bivalents/tetrads (iv) Terminalisation of chiasmata (v) Appearance of chiasmata Identify the different stages with respect to the above given features and select the correct option A. (i) – Leptotene, (ii) – Zygotene, (iii) – Pachytene, (iv) Diplotene, (v) – Diakinesis B. (i) – Leptotene, (ii) – Zygotene, (iii) – Pachytene, (iv) Diakinesis, (v) – Diplotene C. (i) – Leptotene, (ii) – Pachytene, (iii) – Zygotene, (iv) Diakinesis, (v) – Diplotene D. (i) – Leptotene, (ii) – Pachytene, (iii) – Diplotene, (iv) Zygotene,(v) – Diakinesis | 11 |
| 340 | Chromosome number is halved in meiosis during A. Metaphase I B. Anaphase I c. Metaphase II D. Telophase I | 11 |
| 341 | DNA replicates during: ( mathbf{A} cdot G_{2} ) phase B. M phase c. s phase D. ( G_{1} ) phase | 11 |
| 342 | Value Based Questions Which of the following statements is associated with A. prophase, B. meraphase, ( C . ) anaphasc, ( D ). telophase and E. interphase of mitosis? Chromosomes are thickest and shortest. | 11 |
| 343 | Why is meiosis essential in sexually reproducing organisms? | 11 |
| 344 | The second division of meiosis is A. Equational division B. Reductional division c. Multiplied division D. None of the above | 11 |
| 345 | The life of all multicellular organisms through sexual reproduction starts as a A. Zygote B. Sperm cell c. Haploid cell D. Eggg | 11 |
| 346 | The given diagram represents a dividing cell stained with giemsa. From the options given below, identify the correct stage of cell division. A. Leptotene B. Zygotene c. Pachytene D. Diakinesis | 11 |
| 347 | Explanation and types of Mitosis and Meiosis with the help of diagram. | 11 |
| 348 | DNA duplication occurs in A. Mitosis only B. Meiosis only C. Meiosis I and mitosis D. Meiosis II and mitosis | 11 |
| 349 | Tes ( x ) 18. ( infty ) | 11 |
| 350 | What number of chromosomes are present in a gamete as compared to the parent cell after meiosis? A. Twice B. Three times c. same D. half E. One quarter | 11 |
| 351 | In plant cell cytokinesis is marked by the appearance of the cell plate. Cell plate resembles A. Plasma membrane B. Primary cell wall c. secondary cell wall D. middle lemella | 11 |
| 352 | Cell division can not be stopped in phase of the cell cycle. A. Gi phase B. Ga phase c. s phase D. Prophase | 11 |
| 353 | Mitosis and meiosis take place respectively in A. Meristem and gametangia B. Gametangia and meristem C. Permanent tissues and secretory tissues D. Secretory tissues and permanent tissues | 11 |
| 354 | Centriole/centrosome replication occurs in A. Early prophase B. ( G_{1} ) -phase c. S-phase D. ( G_{0} ) -phase | 11 |
| 355 | Meiosis occurs in organisms during A. Sexual reproduction B. Vegetative reproduction c. Both sexual and vegetative reproduction D. None of the above | 11 |
| 356 | Which of the following can not be used to differentiate meiosis with mitosis? A. Replication of chromosome before division B. Exchange of genetic material c. Formation of tetrad D. ( 2 & 3 ) both | 11 |
| 357 | The stage of meiosis where centromere separate is A. Metaphase I B. Telophase II c. Prophase D. Anaphase II | 11 |
| 358 | Which of the following stage of M-phase is considered as tetraploid stage? A. Anaphase of mitosis B. Anaphase-I of meiosis c. Metaphase-II of meiosis D. More than one option is correct | 11 |
| 359 | Synaptonemal complex is site of A. Spindle attachment B. Replication c. Chromatid separation D. Chromosome alignment and recombination | 11 |
| 360 | Match the correct set of scientists in relation to cell division. A. Robert Remak 1. Meiosis ( B ) I S.R. Pelc 2. Mitosis A.Howard and ( mathrm{C} ) W. Fleming 3. Amitosis D. Farmer and Moore 4. Cyclins sand 5. ( mathrm{G}_{1}, mathrm{S} ) ( mathrm{IG}_{2} ) phase ( A cdot A-3, B-2, C-1, D-4 ) B. ( A-3, B-5, C-2, D-1 ) C. ( A-4, B-2, C-3, D-5 ) D. ( A-1, B-2, C-3, D-4 ) | 11 |
| 361 | Post-mitotic phase of the cell in which active synthesis of RNA and proteins takes place is A. S-phase B. Amitotic phase c. ( G_{2}- ) phase D. ( G_{1}- ) phase | 11 |
| 362 | Differentiate between reduction division and equational division | 11 |
| 363 | Mark the incorrect statement w.r.t cell division: A. Ribonuclease suppresses prophase B. In meiosis-II number of chromosomes as well as amount of DNA is reduced to half c. When a cell grows its karyoplasmic ratio decreases which leads to cell division D. Nuclear membrane reappears during telophase | 11 |
| 364 | The critical checkpoints that control the cell cycle are at the ( mathbf{A} cdot G_{1} ) to ( mathrm{S} ) stage and ( G_{2} ) to ( mathrm{M} ) stage B. ( mathrm{S} ) to ( G_{2} ) stage and ( G_{2} ) to M stage ( mathbf{C} cdot mathbf{M} ) to ( G_{1} ) stage and ( G_{2} ) to ( mathbf{M} ) stage D. M to ( G_{1} ) stage and ( mathrm{S} ) to ( G_{2} ) stage | 11 |
| 365 | Synthesis of DNA ends in A. s phase B. Prophase c. Premitotic gap phase D. Post mitotic gap phase | 11 |
| 366 | If the number of bivalent are 8 in metaphase – I, what shall be the number of chromosomes in daughter cells after meiosis – I and meiosis – II respectively. A. 8 and 4 B. 4 and 4 ( c cdot 8 ) and 8 D. 16 and 8 | 11 |
| 367 | Which is the longest phase of cell cycle? ( mathbf{A} cdot mathbf{G}_{1} ) phase B. G_phase c. Prophase D. Telophase | 11 |
| 368 | Non – disjunction in meiosis results in: A. Trisomy B. Normal diploid c. Gene mutation D. None | 11 |
| 369 | The phase of the cell cycle in which DNA synthesis takes place is A ( cdot G_{1} ) phase B. S phase c. ( G_{2} ) phase D. ( G_{0} ) phase | 11 |
| 370 | Crossing over takes place on A. Two stranded stage B. Three stranded stage c. one stranded stage D. Four stranded stage | 11 |
| 371 | At which phase of the cell cycle, DNA polymerase activity is at its highest? A. Gap 1 (GI) B. Mitotic (M) c. synthetic (s) D. Gap 2 (G2) | 11 |
| 372 | Which of the following is an event which does not occur during anaphase- ( 1 ? ) A. Spindle fibres pull homologous chromosomes towards the opposite poles of the spindle B. The homologous chromosomes break their connection and separate out into two haploid sets or dyads C. One such set is present at each end of the spindle D. The process of separation of chromosomes which take place is called disengagement | 11 |
| 373 | Choose the correct answers from the alternatives given : Meiosis involves: A. two nuclear divisions with chromosomes dividing only once B. two nuclear divisions with chromosomes dividing twice c. two nuclear divisions with chromosomes dividing four times D. one nuclear division with chromosomes dividing only once | 11 |
| 374 | The diagram given represents a stage during cell division. Study the same and answer the question that follows. Draw a neat labeled diagram of the stage that comes before the stage shown in the diagram, keeping the chromosome number constant. | 11 |
| 375 | Complete the following statement. During meiosis, there is A. One round of DNA replication and one division B. Two round of DNA replication and one division C. Two round of DNA replication and two division D. One round of DNA replication and two division | 11 |
| 376 | Which of the following condition will occur, if the chromosomes of a eukaryotic cell lack telomerase? A. Have a greater potential to become cancerous than one with telomerase B. Would be able to repair mismatched base pairs during replication c. Not produce okazaki fragments D. Become increasingly shorter with each cycle of replication E. Be unable to take up extraneous DNA from the surrounding solution | 11 |
| 377 | The gap between division phase and start of DNA replication is called as A. Gi phase B. Ga phase c. M phase D. Interkinesis | 11 |
| 378 | Short / Long Answer Type Questions: When and where does meiotic division take place in cells? What is the significance of this type of cell division in the animals life? | 11 |
| 379 | Which of the following statement is not true for meiosis? A. It is a process in which the chromosomes duplicate only once B. It is a process in which the cell divides twice C. The karyokinesis skips one of the phases compared to mitosis D. It results in the formation of four haploid cells | 11 |
| 380 | DNA synthesis takes place in which of the following phase? A. S phase B. ( G_{1} ) phase c. ( mathrm{G}_{2} ) phase D. None of the above | 11 |
| 381 | Distinguish between Mitosis & Meiosis | 11 |
| 382 | The equational division is the term used for A. Amitosis B. Meiosis II c. Meiosis D. Both B and C | 11 |
| 383 | In meiosis, centromere divides during A. Prophase B. Metaphase c. Anaphase D. Anaphase II | 11 |
| 384 | Meiosis I is reduction division. Meiosis Il is equational division due to A. Separation of chromatids B. crossing over c. Pairing of homologous chromosomes D. Disjunction of homologous chromosomes | 11 |
| 385 | In which phase of mitosis the chromatids of chromosomes separate from each other? A. Anaphase B. Telophase c. Metaphase D. Prophase | 11 |
| 386 | The enzyme recombinase is required in which stage of meiosis? A. Zygotene B. Diplotene c. Diakinesis D. Pachytene | 11 |
| 387 | Beads on string of A are seen in B which condense to form chromosomes in ( C ) stage of cell division. A. A- Chromonema B- Chromatin C- Metaphase B. A-Chromatin B- Metaphase C- Metaphase c. A- chromonema B-Chromosome C- Anaphase D. A- chromonema B- Chromatid C- Anaphase | 11 |
| 388 | In anaphase, a metacentric chromosome appears in which of the following? A. I shaped B. J shaped c. ( mathrm{v} ) shaped D. L shaped | 11 |
| 389 | In which stage of the cell cycle are histone proteins synthesised in an eukaryotic cell ? A. G2- stage of prophase B. S-phase c. Entire prophase D. Telophase | 11 |
| 390 | Which cell division is found during cleavage? A. Amitosis B. Mitosiss c. closed mitosis D. Meiosis | 11 |
| 391 | What will be the amount of DNA in meiosis II products, if meiocyte contains 30 pg DNA in G phase? A. 30 pg B. 60 pg c. ( 15 mathrm{pg} ) D. 120 pg | 11 |
| 392 | ( G_{0} ) state of cell denotes A. Death of cell B. Permanent pause c. Exit of cell from cell cycle D. Check point before entering the next phase | 11 |
| 393 | Where does replication of centriole occur? A. Interplase B. Prophase c. Late prophase D. Late telophase | 11 |
| 394 | If the number of bivalents are 8 in metaphase I, what shall be the number of chromosomes in daughter cells after meiosis I and meiosis II respectively. A. 8 and 4 B. 4 and 4 ( c cdot 8 ) and 8 D. 16 and 8 | 11 |
| 395 | Cell in ( G_{0} ) phase of cell cycle A. Exit cell cycle B. Enter cell cycle c. suspend cell cycle D. Terminate cell cycle | 11 |
| 396 | A drug called colchicine interferes in mitosis during the spindle microtubule formation; it does so by A. Arresting chromosome movement B. Breaking microtubules c. Thickening microtubles D. Arresting centriole movement | 11 |
| 397 | When cell division fails after ( S ) – phase (DNA replication) in a diploid cell, the ploidy is A. Haploid B. Diploid c. Tetraploid D. Triploid | 11 |
| 398 | Choose the correct answers from the alternatives given: It is important that the centromere does not divide until the end of metaphase because it A. contains the genes that control prophase B. holds the replicated DNA molecules together ( mathrm{C} ). is connected to the nuclear membrane D. produces the spindle fibres | 11 |
| 399 | Meiosis not occurs in A . Ovule B. Anther c. Microsporangia D. shoot tip | 11 |
| 400 | What occurs in germinal cells during gamete formation? A. One reduction division and one equational division B. Two successive equational divisions c. Two successive reduction divisions D. Short prophase in division I | 11 |
| 401 | The amount of DNA in a mammalian cell in early prophase I is ( x ) What is the amount of DNA in the same cell in anaphase I of meiosis? A ( cdot frac{x}{4} ) в. ( frac{x}{2} ) ( c cdot x ) D. ( 2 x ) | 11 |
| 402 | Pick the correct statements. A. Synapsis of homologous chromosomes takes place during prophase I of meiosis. B. Division of centromeres takes place during anaphase I of meiosis. C. Spindle fibres disappear completely in telophase of mitosis. D. Nucleoli reappear at telophase I of meiosis. A. A only B. C only C. ( A ) and ( B ) only D. A, C and Donly E. A and C only | 11 |
| 403 | Which among the following is a stage of meiosis during which pairs of homologous chromosomes align at the center of the cell? A. Anaphase II B. Metaphase! c. Prophase II D. Metaphase II I I Instaphse . meses E. Prophase I | 11 |
| 404 | Number of bivalents, chromatid tetrads, DNA strands, telomeres present in pachytene phase of meiocyte of maize is A .20,20,80,80 в. 20, 20, 40, 80 ( c cdot 10,10,40,80 ) D. 10, 20, 40, 40 | 11 |
| 405 | If a specialised cell no longer divides, it is generally locked in which stage of the cell cycle? A. B. ( mathrm{c} cdot G_{2} ) D. ( G_{1} ) | 11 |
| 406 | The bulk of histone proteins are synthesized in A ( cdot G_{1} ) phase B. ( G_{2} ) phase c. s phase D. ( G_{0} ) phase | 11 |
| 407 | Spindle fibres attach on to A. Telomere of the chromosome B. Kinetochore of the chromosome c. Centromere of the chromosome D. Kinetosome of the chromosome | 11 |
| 408 | If we ignore the effect of crossing over, how many different haploid cells arise by meiosis in a diploid cell having ( 2 n=12 ? ) ( A cdot 8 ) B. 16 ( c cdot 32 ) D. 64 | 11 |
| 409 | Plasmodesmata take part in A. Synchronous mitotic divisions B. Cytoplasmic streaming C. Movement of substances between cells D. Locomotion in unicellular organisms | 11 |
| 410 | If the egg of an organism has 40 pg of DNA in its nucleus, how much DNA would a diploid cell of same organism have in pachytene(X), diakinesis(Y) and anaphase-I(Z)? A. ( x=160 ) pg, ( Y=160 ) pg, ( z=160 p g ) B. ( mathrm{x}=80 mathrm{pg}, mathrm{Y}=80 mathrm{pg}, mathrm{Z}=160 mathrm{pg} ) c. ( x=160 p g, Y=80 ) pg, ( z=160 p g ) D. ( x=80 ) pg, ( Y=160 p g, z=80 ) pg | 11 |
| 411 | Which of the following stage is affected by colchicine? A. Metaphase B. Prophase c. Interphase D. Anaphase | 11 |
| 412 | Which phase of mitosis is essentially the reverse of prophase in terms of nuclear changes? A. ( s ) – phase B. Anaphase c. Telophase D. Interphase | 11 |
| 413 | If egg of an organism has ( 10 p g ) of DNA in its nucleus. How much DNA would a diploid cell of same organism have in ( G_{2} ) phase of meiosis? A . ( 10 p g ) B. ( 5 p g ) ( mathrm{c} cdot 2 p g ) D. ( 40 p g ) | 11 |
| 414 | Select the correct statement about ( G_{1} ) phase. A. Cell is metabolically inactive B. DNA in the cell does not replicate C. It is not a phase of synthesis of macromolecules D. Cell stops growing | 11 |
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