Cell Cycle And Cell Division Questions

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Cell Cycle And Cell Division Questions

List of cell cycle and cell division Questions

Question NoQuestionsClass
1What 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
2Nuclear membrane disappears in
A. Late prophase
B. Early prophase
c. Metaphase
D. Telophase
11
3Fill 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
4Terminalisation is related with
A. Mitosiss
B. Meiosiss
c. Diakinesis
D. Telophase
11
5The 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
6Very Short Answer Types:
Give a specific scientific term for each
of the following. The period between two successive mitotic divisions.
11
7is the most complicated and longest phase of meiotic division.
A. Prophase I
B. Prophase I
c. Metaphase I
D. Metaphase II
11
8Cells 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
9Spindle 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
10The 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
11The stage of cell cycle after DNA replication is
( A cdot G_{1} )
B. ( G_{2} )
( c cdot s )
D. M
E. Cytokinesis
11
12In pachytene stage of meiosis, the chromosomes appear
A. single stranded
B. Double stranded
c. Three stranded
D. Four stranded
11
13Which 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
14Radioactive 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
15What happens during telophase?
A. Nuclear membrane is formed
B. Nucleolus appears
c. Astral rays disappear
D. All of the above
11
16Bouquet stage is observed in stage of the cell division.
A. Leptotene
B. Zygotene
c. Diplotene
D. Pachytene
11
17Genes do not occur in pairs in
A. Zygote
B. Somatic cell
C. Endosperm cells
D. Gametes
11
18During 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
19In 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
20Leptotene chromosomes have
A. two chromatids
B. one chromatids
c. four chromatids
D. no chromatids
11
21Choose the correct answers from the
alternatives given :
Synapsis is characteristic of
A. leptotene
B. zygotene
c. pachytene
D. diakinesis
11
22is a point at which crossing over has taken place between homologous chromosomes.
A. Chiasmata
B. Synaptonemal complex
c. centromeres
D. Protein axes
11
23Which 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
24stage of cell division occurs after
( G_{2} ) phase
A. Prophase
B. Metaphase
c. Anaphase
D. Diakinesis
11
25Choose 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
26Synaptonemal complex is characteristic of
A. Mitotic chromosomes
B. Leptotene chromosomes
c. Paired meiotic chromosomes
D. Metaphase
11
27Which 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
28A contractile mid-body forms during cytokinesis in
A. Animal
B. Higher plants
c. Fungi
D. Algae
11
29Yeast complete cell cycle in
A. 30 minutes
B. 60 minutes
c. 90 minutes
D. 120 minutes
11
30Identify 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
31Fill in the blanks with appropriate
words.

Synapsis, chiasma formation and crossing over occur between homologous chromosomes in of meiosis.

11
32In meiosis, synapsis occurs during
A. S-phase
B. Interphase
c. Metaphase
D. Prophase 1
11
33An 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
34The 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
35In 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
36State 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
37The 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
38The 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
39In cell division, spindle fibres are made up of protein
A. Myoglobin
B. Tubulin
c. Albumin
D. Myosin
11
40How meiosis differs from mitosis?11
41No. of meiotic divisions required for the
formation of 200 seeds of Capsella will
be?
A . 200
в. 400
c. 250
D. 300
11
42In 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
43What 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
44A haploid cell doesn’t undergo
A. Mitosis
B. Meiosis
c. ATP production
D. DNA replication
E. Transcription
11
45Assertion
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
46The chromosome exhibit high level of coiling at which phase of karyokinesis?
A. Prophase
B. Metaphase
c. Telophase
D. Interphase
11
47A 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
48Which of the following involves in formation of mitotic spindle?
A . ca
B. s
c. мg
D.
11
49In which phase, proteins for spindle fibre formation are synthesized?
A. Gi phase
B. Ga phase
c. s phase
D. Anaphase
11
50Each metaphasic plate in heterotypic division of meiosis contains half the
number of diploid set of chromosomes.
11
51In 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
52A 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
53In 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
54In 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
55Which 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
56In which stage of cell division, division of matrix of chromosome occurs?
A. Late prophase
B. Early metaphase
c. Late metaphase
D. Anaphase
11
57Identify 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
58In which stage DNA replication takes place?
A. Metaphase
B. ( G_{1} ) -phase
c. ( S ) – phase
D. ( G_{2} ) -phase
11
59In animals, mitotic cell division is only
seen in?
A. Haploid somatic cells
B. Diploid somatic cells
c. Diploid meiocytes
D. 1 and 3
11
60Which 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
61Centrosomes occurs in
A. Green plants
B. Bacteria
C. Animal cells
D. All of the above
11
62If 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
63Reorganisation of genetic material or genetic recombination occurs during
A. Metamorphosis
B. Organogenesis
c. Mitosiss
D. Meiosis
11
64Pick 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
65Choose 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
66Which 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
67Which 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
68Division of nucleus is indirect in
A. Mitosis
B. Binary fission
c. Budding
D. Fragmentation
11
69For 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
70If 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
71Look at the given picture. Describe the
changes in the nuclear material from
stage ( A ) to stage ( B )
11
72Fill in the blanks with appropriate
words.

In meiotic division, prophase lis
completed in five successive stages, viz and

11
73Define Karyokinesis.11
74Which 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
75Name the stage of mitosis in which chromosomes are arranged on the equator of spindle fibre.
A. Anaphase
B. Metaphase
c. Prophase
D. Telophase
11
76Restorage 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
77When 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
78In a prokaryotic cell, cell division takes
place by ……………………….. type of reproduction
11
79Out 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
80Cell plate is referred as
A . Germplast
B. Idioblast
c. Phragmoplast
D. Middle lamella
11
81Significance 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
82Which 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
83Compare between metaphase I and metaphase II of meiosis?11
84In which stage of meiosis, homologous chromosomes are segregated
A. Metaphase I
B. Anaphase I
c. Anaphse II
D. Metaphase II
11
85Identify 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
86What would have been happened if any
of the cells in nature had not been
divided by meiosis?
11
87Identify the following figure of cell cycle:-
A. Anaphase I
B. Metaphase
c. Anaphase II
D. Telophase II
11
88You 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
89Match 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
90Congression 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
91Write any two significance of meosis?
How does anaphase of mitosis different
from anaphase of meiosis
11
92The 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
93Which among the following is the
longest phase of cell cycle?
A. Prophase
B. Telophase
( c cdot G_{1} )
D. ( G_{2} )
11
94DNA 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
95Metaphase 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
96In cell cycle, during which phase, chromosomes are arranged in equatorial plate?
A. Metaphase
B. Anaphase
c. Telophase
D. Prophase
11
97Choose 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
98The important event of meiosis is the
crossing over. It occurs during
A. Leptotene
B. Pachytene
c. Diplotene
D. zygotene
11
99The 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
100Write the differences between mitosis
and meiosis.
11
101During 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
102The formation of multivalent at meiosis
in a diploid organism is due to.
A. Inversion
B. Deletion
c. Monosomy
D. Reciprocal translocation
11
103The 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
104Identify 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
105Distinguish between anaphase of mitosis and anaphase I of meiosis.11
106In 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
107Short / Long Answer Type Questions:
How meiosis differs from mitosis? In
which plant organ both divisions can be studied?
11
108An 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
109Choose 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
110Assertion
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
111A parenchymatous cell has 20 units of DNA. It starts to divide mitotically
How many units of DNA would it have during anaphase, and
11
112Give one basic difference between
cytokinesis in plant cells and animal cells.
11
113Which 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
114Which 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
115In meiosis I, the inter zonal fibers
appear in which stage?
A. Prophase I
B. Metaphase
c. Anaphase!
D. Telophase I
11
116Post 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
117Number 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
118List any two significance of meiosis?11
119Fill in the blanks with appropriate
words.
Strictly speaking interphase is a phase of ( ldots ldots . . . . ) metabolism.
11
120Mitosis
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
121In 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
123During cell division in apical meristem nuclear membrane reappears in
A. Interphase
B. Telophase
c. Prophase
D. S phase
11
124Synaptonemal complex is formed during
A. Meiosiss
B. Amitosis
c. Mitosiss
D. cytokinesis
11
125In tetrad, the number of non-cross over
chromatids is normally
A. Four
B. Two
c. one
D. None of the above
11
126Which type of cell division occurs in the gonads?
A. Mitosis only
B. Meiosiss
c. Both A and B
D. Amitosis and meiosis
11
127At what phase of meiosis are homologous chromosomes separated?
A. At prophase II
B. At prophase
c. At anaphase
D. At anaphase II
11
128Which 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
129Segregation or Mendelian factors (no linkage, no crossing over) occurs during
A. Anaphase!
B. Anaphase II
c. Diplotene
D. Metaphase I
11
130How many mitotic divisions are needed
for a single cell to make 128 cells?
A. 7
B. 14
( c cdot 28 )
D. 32
11
13135. Crossing-over occurs during
(1) Leptotene
(2) Zygotene
(3) Pachytene
(4) Diplotene
11
132Separation of homologous chromosomes is called
A. Dispersion
B. Bivalent formation
c. Disjunction
D. crossing over
11
133Arrange 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
134Chromosomal morphology (structure) is best observed at
A. Prophase
B. Metaphase
c. Interphase
D. Anaphase
11
135The 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
136Meiosis 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
137Homologous chromosomes separates
in which of the following phase of
meiosis?
A. Metaphase!
B. Metaphase II
c. Anaphase!
D. Anaphase II
11
138Which 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
139At 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
140Four 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
141The cellular structure which disappear during mitosis is
A. Plasma membrane
B. Nuclear membrane
c. Mitochondria
D. Nuclear membrane and nucleolus
11
142A 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
143What is ( G_{0} ) (quiescent phase) of cell
cycle?
11
144A 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
145The 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
146If 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
147Which of the following is the most primitive type of mitosis?
A. Amitosis
B. Cryptomitosis
c. Endomitosis
D. zygotic mitosis
11
148Karyokinesis 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
149In 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
150DNA synthesis occurs in
A. G-phase
B. S-phase
c. ( G_{2} ) phase
D. M phase
11
151Which 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
152Length of chromosome/ chromatid to
increase in
A. Anaphase
B. Prophase
c. Metaphase
D. Telophase
11
153Differentiate between:
Mitosis and.meiosis II
11
154The 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
155Which phase comes in between the G1
and G2 phases of cell cycle?
A. M-phase
B. Go phase
c. s-phase
D. Interphase
11
156Meiosis 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
157Very 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
158During 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
159Choose 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
160Which 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
161Select 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
162During 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
163Splitting pf centromere and hence separation of chromatids occurs during
A. prophase-II
B. anaphase- –
c. anaphase -II
D. metaphase-I
11
164Most organelles show duplication in cell cycle during
A ( cdot G_{1} ) – phase
B. ( G_{0} ) – phase
c. ( S ) -phase
D. ( G_{2} ) – phase
11
165Define cell cycle?11
166Name the two types of cytokinesis.11
167Choose the correct answers from the
alternatives given :
Chromosomes are in their most
extended form during:
A. interphase
B. anaphase
c. metaphase
D. prophase
11
168Arrange 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
169The function of meiosis I is to separate
A. Homologous chromosomes
B. Parental chromosomes
c. sister chromatids
D. cross overs
11
170Number of DNA molecules in a
metaphase chromosome is
A. Many
B. Three
c. one
D. Two
11
171What is cell division? Write two types of cell division?11
172In 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
173The 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
174Meiosis 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
175Which one of the organelles is responsible for the formation of aster in cell division?
A. Chromosome
B. Lysosome
c. Ribosome
D. centrosome
11
176Which 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
178The 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
179Mitosis can be studied in
A. Onion root trip
B. Garlic root tip
c. Tendril tip
D. All the above
11
180Shape of chromosome can be best observed during
A. Prophase
B. Metaphase
c. Anaphase
D. Telophase
11
181A 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
182In 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
183A 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
184Pick 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
185During which stage of prophase I, genetic recombination of parental characters, takes place?
A. Zygotene
B. Pachytene
c. Diplotene
D. Diakinesis
11
186Chromosome start separating at which stage of mitosis?
A. Early metaphase
B. Late metaphase
c. Early anaphase
D. Early telophase
11
187The synaptonemal complex first
appears at
A. Leptotene
B. Pachytene
c. zygotene
D. Diplotene
11
188The 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
190In 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
191What 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
192List the main difference between
mitosis and meiosis.
11
193Which 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
194HeLa 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
195Equatorial plate is found in which of the following stages?
A. Metaphase
B. Prophase
c. Telophase
D. Anaphase
11
196Assertion
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
197After 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
198The 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
199At 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
200In 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
201is the longest stage of meiotic division.
A. Prophase
B. Metaphase
c. Anaphase
D. Telophase
11
202What 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
203What is the significance of meiosis? How does meiosis differ from mitosis?11
204As 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
205In mitosis, the spindle is
A. Bipolar
B. Multipolar
c. Apolar
D. Random
11
206The 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
207Crossing over takes place in
A. Prophase
B. Metaphase
c. Anaphase
D. Prophase I
11
208Very 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
209Each chromosome composed of one chromatid in
A. Anaphase!
c. Metaphase!
D. Metaphase II
11
210Distinguish 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
212Division of cytoplasm is called
A. Karyokinesis
B. crossing over
c. cytokinesis
D. Kinesiss
11
213The terminalization process starts in
A. Leptotene
B. Zygotene
c. Diplotene
D. Diakinesis
11
214If 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
215Cell 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
217In which phase does the spindle fiber disappear
A. Prophase
B. Metaphase
c. Anaphase
D. Telophase
11
218Match 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
219Statement 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
220If 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
221In mitosis, chromosome duplication
occurs during
A. Interphase
B. Prophase
c. Late prophase
D. Late telophase
11
222Assertion
( 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
223Who coined the term meiosis?
A. Hertwig and Van Bevedin
B. Sutton and Boveri
C. Hofmeister and Waldeyer
D. Farmer and Moore
11
224Mitosis usually results in the production of diploid daughter cells with identical genetic complement.11
225The 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
226The longest phase of mitosis is
A. Prophase
B. Metaphase
c. Anaphase
D. Telophase
11
227The 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
228Homologous chromosomes segregate during
A. Fertilization
B. Meiosis I
c. Meiosis II
D. Mitosis
11
229Identify 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
230During cytokinesis in plants, which of the following secretes the middle lamella?
A. Golgi body
B. SER
c. RER
D. Lysosomes
11
231During 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
232In 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
233At 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
234The complex formed by a pair of synapsed chromosomes is called as
A. Kinetochore
B. Bivalent
c. Axoneme
D. Equatorial plate
11
235Human being are different in their colour size etc but yet they belong to same species. Explain.11
236The 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
237The 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
238Spindles are arrested by colchicine at
A. Anaphase
B. Metaphase
c. Telophase
D. Prophase
11
239The enzyme recombinase is required at which stage of meiosis?
A. Pachytene
B. Zygotene
c. Diplotene
D. Diakinesis
11
240Disjunction is
A. Chromosome separition during interphase
B. Chromosome separation during prophas I
C. Chromosome separation in anaphase I
D. Chromosome separation duri metaphase
11
241Name the process where cytoplasmic
material is divided into daughter cells.
A. Cell division
B. Cytokinesis
c. Karyokinesis
D. All of the above
11
242The 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
243The chromosome replication occurs
during
A. s phase
B. G_phase
c. Metaphase
D. Anaphase
11
244Prophase is longer in
A. Mitosiss
B. Meiosis
c. Equal in both
D. Amitosis
11
245During which phase of meiosis do homologous chromosomes separate?
A. Anaphase
B. Prophase
c. Anaphase I
D. Prophase II
E. Metaphase!
11
246How 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
247What do you understand by cell cycle?11
248Which term best describes the nuclear
material present during interphase?
A. Chromosomes
B. Chromatids
c. Chromatin
D. centromeres
E. Centrioles
11
249Define:
a) Mitosis and
b) Meiosis
11
250What is the first phase of Mitiosis?
Write the changes that take place in that stage.
11
251How 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
252Karyoplasmic 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
253Meiosis takes place in
A. Meiocyte
B. conidia
c. Gemmule
D. Megaspore
11
254results in division of a cell into four
cells.
A. Mitosis
B. Interphase
c. Prophase
D. Meiosis
11
255Find 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
256The process of mitosis can be studied
in
A. Onion root tip
B. Garlic root tip
c. Tendril tip
D. All of the above
11
257The 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
258Anaphase 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
259Differentiate between :
Metaphase and anaphase of mitosis
11
260Fill in the blanks with appropriate
words.
The cell cycle is divisible into two main
phases ( ldots ldots ldots . . ) and
11
261Define S phase and related events.11
262In what two ways is mitotic division in
an animal cell different from the mitotic
division in a plant cell?
11
263The thick-thread stage occurs in
A. Leptotene
B. Zygotene
c. Pachytene
D. Diplotene
11
264The 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
265State 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.
A. True
B. False

11
266Which 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
267How 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
268Terminalisation takes place during
A. Pachytene
B. Zygotene
c. Leptotene
D. Diakinesis
11
269The 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
270What is Quiescent stage in cell division
( ? )
11
271If 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
272The 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
273Explain why mitosis is called equational and meiosis is called reductional division?11
274Cells in Go phase of cell cycle
A. Exit cell cycle
B. Enter cell cycle
c. suspend cell cycle
D. Terminate cell cycle
11
275A 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
276The 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
277Name 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
278The longest stage of meiosis is
A. Zygotene
B. Diplotene
c. Pachytene
D. Diakinesis
11
279The 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
280Cytokinesis is followed by
( mathbf{A} . M ) phase
B. ( G_{1} ) phase
c. ( S ) phase
D. ( G_{2} ) phase
11
281Meiosis II fails after completion of meiosis I. This phenomenon
A. Beachymeiosis
B. Dinomitosis
c. Karyokinesis
D. Noni
11
282At metaphase, chromosomes are attached to the spindle fibres by their
A. Kinetochores
B. Centromere
c. Satellites
D. Secondary constrictions
11
283At which stage of meiosis the chromosome number reduces to half?
A. Anaphase!
B. Anaphase II
c. Telophase I
D. Telophase II
11
284At 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
285In 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
286Which of the following is the shortest phase of meiosis?
A. Prophase
B. Metaphase I
c. Anaphase I
D. Prophase II
E. Metaphase II
11
287A 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
288is present between meiosis I and meiosis II.
A. Interphse
c. Interkinesis
D. Telophase II
11
289In 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
290Cross-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
291Which 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
292Human 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
293Name the following The stage at which centresome attaching the two chromatids divide.11
294The 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
295Calculate the number of chromatids if a
cell has 20 bivalents in prophase I.
A . 40
B. 80
c. 20
D. 60
11
296Identify 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
297A 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
298Anastral mitosis can be traced in
A. Invertebrates
B. Vertebrates
c. Both A and B
D. Plant cells
11
299Given 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
300Nuclear spindle has ……….. types of fibres
A. one
B. Two
c. Three
D. Four
11
301Assertion
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
302Which is synthesized in G_phase?
A. DNA polymerase
B. Histones
c. Nucleolar DNA
D. Tubulin protein
11
303The metabolism of cell decreases
during prophase again increases during which of the following phase?
A. Telophase
B. Anaphase
c. Metaphase
D. Gi phase
11
304Assertion
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
305The 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
306An 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
307Very Short Answer Types:
In which phase, the synthesis of new DNA molecules takes place?
11
308There 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
309In 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
310Dyad is a pair of
A. sister chromatide
B. non-sister chromatids
C. homologous chromosomes
D. non-homologous chromosomes
11
311Very Short Answer Types:
In which phase of prophase I, crossing over takes place?
11
312In onion root tip during mitotic metaphase, the number of kinetochores
is
( A cdot 4 )
B. 64
( c cdot 32 )
D. 16
11
313In mitosis, splitting of chromatids up to the centromere takes place in
A. Prophase
B. Metaphase
c. Anaphase
D. Telophase
11
314The stage during which separation of the paired homologous chromosomes begins is
A. Diakinesis
B. Pachytene
c. zygotene
D. Diplotene
11
315Diploid cells have
A. Two chromosomes
B. One set of chromosomes
C. Two pairs of chromosomes
D. Two sets of chromosomes
11
316In which phase proteins for spindle fibre formation are synthesized?
( A cdot G_{1}- ) phase
B. G_-phase
c. s-phase
D. Anaphase
11
317The cytoplasm divides at
A. Mitosis
B. Prophase
c. Cytokinesis
D. Interphase
E. Metaphase
11
318Visible expression of the genetic phenomenon of crossing over is called
A. Recombination
B. Condensation
c. chiasmata
D. Spiralization
11
319During 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
320In which stage do chromosomes appear as thin long threads?
A. Zygotene
B. Pachytene
C. Leptotene
D. Prophose
11
321Assertion
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
322Best stage to observe shape, size and number of chromosomes is
A. Interphase
B. Metaphase
c. Prophase
D. Telophase
11
323Spindle fibres are attached to kinetochores of chromosomes in?
A. Metaphase
B. Anaphase
c. Telophase
D. 1 and 2
11
324The 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
325DNA replication occurs during
A. Prophase
B. Metaphase
c. Cytokinesis
D. Interphase
E. Telophase
11
326The DNA molecules of each
chromosome replicates in
A. Gi phase
B. ( G_{2} ) phase
c. s phase
D. Mitotic phase
11
327The 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
328During 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
329The 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
33056 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
331At 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
332Which 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
333What 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
334In which stage of cell cycle, DNA replication occurs?
A. Gi phase
B. s phase
c. ( mathrm{G}_{2} ) phase
D. M phase
11
335What 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
336Discuss 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
337Select 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
338The 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
339Refer 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
340Chromosome number is halved in
meiosis during
A. Metaphase I
B. Anaphase I
c. Metaphase II
D. Telophase I
11
341DNA replicates during:
( mathbf{A} cdot G_{2} ) phase
B. M phase
c. s phase
D. ( G_{1} ) phase
11
342Value 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
343Why is meiosis essential in sexually
reproducing organisms?
11
344The second division of meiosis is
A. Equational division
B. Reductional division
c. Multiplied division
D. None of the above
11
345The life of all multicellular organisms through sexual reproduction starts as a
A. Zygote
B. Sperm cell
c. Haploid cell
D. Eggg
11
346The 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
347Explanation and types of Mitosis and Meiosis with the help of diagram.11
348DNA duplication occurs in
A. Mitosis only
B. Meiosis only
C. Meiosis I and mitosis
D. Meiosis II and mitosis
11
349Tes
( x )
18.
( infty )
11
350What 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
351In 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
352Cell division can not be stopped in phase of the cell cycle.
A. Gi phase
B. Ga phase
c. s phase
D. Prophase
11
353Mitosis 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
354Centriole/centrosome replication
occurs in
A. Early prophase
B. ( G_{1} ) -phase
c. S-phase
D. ( G_{0} ) -phase
11
355Meiosis occurs in organisms during
A. Sexual reproduction
B. Vegetative reproduction
c. Both sexual and vegetative reproduction
D. None of the above
11
356Which 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
357The stage of meiosis where centromere
separate is
A. Metaphase I
B. Telophase II
c. Prophase
D. Anaphase II
11
358Which 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
359Synaptonemal complex is site of
A. Spindle attachment
B. Replication
c. Chromatid separation
D. Chromosome alignment and recombination
11
360Match 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
361Post-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
362Differentiate between reduction
division and equational division
11
363Mark 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
364The 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
365Synthesis of DNA ends in
A. s phase
B. Prophase
c. Premitotic gap phase
D. Post mitotic gap phase
11
366If 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
367Which is the longest phase of cell cycle?
( mathbf{A} cdot mathbf{G}_{1} ) phase
B. G_phase
c. Prophase
D. Telophase
11
368Non – disjunction in meiosis results in:
A. Trisomy
B. Normal diploid
c. Gene mutation
D. None
11
369The 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
370Crossing over takes place on
A. Two stranded stage
B. Three stranded stage
c. one stranded stage
D. Four stranded stage
11
371At 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
372Which 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
373Choose 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
374The 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
375Complete 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
376Which 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
377The gap between division phase and start of DNA replication is called as
A. Gi phase
B. Ga phase
c. M phase
D. Interkinesis
11
378Short / 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
379Which 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
380DNA 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
381Distinguish between Mitosis & Meiosis11
382The equational division is the term
used for
A. Amitosis
B. Meiosis II
c. Meiosis
D. Both B and C
11
383In meiosis, centromere divides during
A. Prophase
B. Metaphase
c. Anaphase
D. Anaphase II
11
384Meiosis 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
385In which phase of mitosis the chromatids of chromosomes separate
from each other?
A. Anaphase
B. Telophase
c. Metaphase
D. Prophase
11
386The enzyme recombinase is required in which stage of meiosis?
A. Zygotene
B. Diplotene
c. Diakinesis
D. Pachytene
11
387Beads 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
388In anaphase, a metacentric
chromosome appears in which of the following?
A. I shaped
B. J shaped
c. ( mathrm{v} ) shaped
D. L shaped
11
389In 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
390Which cell division is found during cleavage?
A. Amitosis
B. Mitosiss
c. closed mitosis
D. Meiosis
11
391What 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
393Where does replication of centriole
occur?
A. Interplase
B. Prophase
c. Late prophase
D. Late telophase
11
394If 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
395Cell in ( G_{0} ) phase of cell cycle
A. Exit cell cycle
B. Enter cell cycle
c. suspend cell cycle
D. Terminate cell cycle
11
396A 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
397When cell division fails after ( S ) – phase
(DNA replication) in a diploid cell, the
ploidy is
A. Haploid
B. Diploid
c. Tetraploid
D. Triploid
11
398Choose 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
399Meiosis not occurs in
A . Ovule
B. Anther
c. Microsporangia
D. shoot tip
11
400What 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
401The 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
402Pick 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
403Which 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
404Number 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
405If 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
406The bulk of histone proteins are synthesized in
A ( cdot G_{1} ) phase
B. ( G_{2} ) phase
c. s phase
D. ( G_{0} ) phase
11
407Spindle 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
408If 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
409Plasmodesmata take part in
A. Synchronous mitotic divisions
B. Cytoplasmic streaming
C. Movement of substances between cells
D. Locomotion in unicellular organisms
11
410If 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
411Which of the following stage is affected by colchicine?
A. Metaphase
B. Prophase
c. Interphase
D. Anaphase
11
412Which phase of mitosis is essentially the reverse of prophase in terms of nuclear changes?
A. ( s ) – phase
B. Anaphase
c. Telophase
D. Interphase
11
413If 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
414Select 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
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