(a) single cell (b) many cells (c) few cells (d) few organs
2. The sequence of events by which a cell duplicates its genome, synthesize the other constituent
of cells and eventually divides itself into two daughter cells is termed as
(a) cytology (b) cell division (c) cell cycle (d) cell biology
3. Which of the following is correct about cell cycle?
(a) All events occur in coordinated manner
(b) All events are under genetic control
(c) DNA synthesis occurs only during one specifi c stage in the cell cycle
(d) All
4. Cell growth (increase in cytoplasm) is a
(a) continuous process (b) discontinuous process
(c) irregular process (d) retrogressive process
5. Our cell can divide itself once approximately in
(a) 24 hours (b) 24 minutes (c) 24 seconds (d) 24 days
6. Duration of cell cycle in yeast is approximately
(a) 90 seconds (b) 90 minutes (c) 20 minutes (d) 45 minutes
8. M-phase in human cell lasts for
(a) 1 hour (b) 2 hours (c) 23 hours (d) 4 hours
9. Which of the following is correct about Interphase?
(a) It is the phase present between two successive M-phase
(b) It lasts for more than 95% in duration of cell cycle in human cell
(c) It is also known as mitosis phase
(d) All
10. Select correct matching:
Column I Column II
A. G1
Phase – 1. Gap 1 Phase
B. Cytokinesis – 2. Nuclear division
C. Karyokinesis – 3. Cytoplasmic division
D. S phase – 4. Synthesis phase
(a) B‒1, C‒2, A‒3, D‒4 (b) A‒1, C‒2, B‒3, D‒4
(c) D‒1, C‒2, B‒3, A‒4 (d) A‒1, D‒2, B‒3, C‒4
11. G1
-phase is not characterized by
(a) continuous growth (b) active metabolism
(c) DNA replication (d) non-replication of DNA
12. S-phase is not characterized by
(a) DNA duplication
(b) no increase in chromosome number
(c) DNA replication
(d) duplication of centriole in nucleus of eukaryotic animal cell
13. Which is continuously occurring in dividing G1
, S, and G2
phase?
(a) DNA Replication (b) DNA Duplication
(c) Centriole duplication (d) Growth of cell
14. If a cell has 2n number of chromosome in G1
-phase, what is the number of chromosome in cell
after S-phase?
(a) n (b) 4n (c) 2n (d) 8n
16. Those cells which do not divide enter ____ phase from G1
-phase.
(a) S-phase (b) Directly G2
-phase (c) G1
-phase (d) Any one of these
17. G0
-phase is characterized by
(a) DNA duplication (b) Active metabolism
(c) S-phase (d) M-phase
18. Select the incorrect statement from the following:
(a) In animals, mitotic cell division is only seen in the diploic somatic cells
(b) Plant can show mitotic division in both haploid and diploid cells
(c) In an adult’s heart, cells do not divide
(d) All organisms starts their life cycle from multiple cell
19. Mitosis is further divided in ____ stages of cytoplasmic division?
(a) 1 (b) 2 (c) 3 (d) None
20. Prophase is characterized by
(a) initiation of condensation of chromosomal material
(b) centrioles moving towards opposite pole
(c) initiation of the assembly of mitotic spindle
(d) all
21. Cells at the end of prophase, when viewed under the microscope, do not show
(a) golgi body and ER (b) nucleolus
(c) nuclear envelop (d) all
22. Which of the following initiates the start of metaphase?
(a) Completion of bivalent chromosome formation
(b) Assemblage of microtubules of nucleoplasm
(c) Complete disintegration of nuclear envelope
(d) Duplication of chromosome
23. Metaphase is not characterized by
(a) complete condensation of chromosome
(b) alignment of chromosome on metaphase plants
(c) attachment of spindle fi bre to kinetochore
(d) splitting of chromosome
25. Anaphase is characterized by
(a) splitting of centromere (b) separation of chromatids
(c) movement of chromatid to opposite pole (d) all
26. Events of telophase are
(a) chromosomes cluster at opposite spindle poles and their identity is lost as discrete
elements
(b) nuclear envelope assembles around the chromosome cluster
(c) nucleolus, Golgi complex and ER reforms
(d) all
27. Furrow formation does not occur in plant cell during cytokinesis because of
(a) extensible cell wall (b) inextensible cell wall
(c) extensible plasma membrane (d) inextensible plasma membrane
28. Select the total number of correct statements.
I. Cell-plate formation occurs in plant cell during cytokinesis.
II. During cytokinesis, mitochondria and plastid get distributed between two daughter cells
in mitosis.
III. Liquid endosperm in coconut is syncytium.
IV. Furrow formation occur in animal cell during cytokinesis.
(a) I only (b) II only (c) III only (d) IV only
29. Cell which divide by mitosis is
(a) upper layer of epidermis (b) cells lining gut
(c) stem cells (d) all
30. Plant shows continuous growth throughout their life because of
(a) mitosis (b) amitosis (c) meiosis (d) all
31. Mitosis helps
(a) growth (b) repair (c) both (d) none
32. Which of the following holds true about meiosis?
I. It ensure production of haploid phase is the life cycle of sexually reproducing organism
where fertilization restores the diploid phase.
II. It involved two sequential cycle of nuclear and cell division called meiosis I and II but
only a single cycle of DNA replication.
III. It involves pairing of homologous chromosomes and recombination between them.
IV. Four haploid cells are formed at the end of meiosis.
(a) I, II, IV only (b) IV only (c) I and III only (d) All
33. Prophase I is divided into how many phases based on chromosomal behaviour?
(a) 1 (b) 2 (c) 4 (d) 5
34. Synaptonemal complex formes in
(a) zygotene (b) pachytene (c) diplotene (d) dikinesis
35. Select the correct statement from the following:
(a) In leptotene stage chromosomes become gradually visible under light microscope
(b) During zygotene heterologus chromosome shows pairing
(c) Chiaswater is a J-shape structure formed in diplotene
(d) Pachytene is characterized by the formation of synaptonemal complex
36. Recombination is seen in
(a) diplotene (b) zygotene or synaptotene
(c) pachytene (d) dikinesis
37. Synaptonemal complex is visible in
(a) compound microscope (b) simple microscope
(c) hand lens (d) electron microscope
38. Crossing over is an exchange of genetic material between
(a) homologous chromosome (b) heterologus chromosome
(c) non-homologous chromosome (d) all
39. Beginning of diplotene is characterized by
(a) recombination (b) synapsis
(c) dissolution of synaptonemal complex (d) formation of tetrad
40. Dikinesis is characterized by
(a) condensation of chromosome
(b) assemblage of spindle
(c) disappearance of nucleous and nuclear membrane
(d) all
41. Homologus chromosomes separate during
(a) Metaphase-I (b) Anaphase-I (c) Anaphase-II (d) Telophase-I
42. The stage between two meiosis is
(a) M-phase (b) interphase (c) S-phase (d) interkinesis
43. Which of the following statement is incorrect?
(a) Prophase II is simpler than prophase I
(b) Prophase I is longer and complex than prophase of mitosis
(c) Nuclear membrane reappear in telophase I
(d) Anaphase II is not characterized by splitting of centromere
44. Meiosis is signifi cant because it
(a) increases genetic variability
(b) helps in the conservation of specifi c chromosome number
(c) is important for evolution
(d) all
45. Most of the cell organelle duplicate during
(a) G1
-phase (b) S-phase (c) G2
-phase (d) M-phase
46. Reduction of the division is
(a) meiosis (b) mitosis (c) both (d) none
47. The main diff erence between dividing an animal and plant cell lies in
(a) cell plate formation (b) chromosome movement
(c) coiling of chromosome (d) chromosome division
48. Which of the following cells do not divide once it is diff erentiated?
(a) Interstitial cells (b) Nerve cells (c) Blood cells (d) Glial cells
49. Mitosis occurs in
(a) haploid cells only (b) diploid cells only
(c) triploid cells only (d) both (a) and (b)
50. Interphase is also called resting stage because
(a) cell has stopped diff erentiation
(b) cell is metabolically inactive
(c) no visible changes occur in the nucleus
(d) cell does not grow
51. Diploid somatic cells is divided by
(a) meiosis (b) mitosis only
(c) both meiosis and mitosis. (d) none
52. Cell division takes place when the cell
(a) is haploid (b) becomes diploid
(c) attains optimum growth (d) any time
53. Before cell division, the entire DNA content of the cell gets doubled during interphase.This
doubling takes place
(a) throughout the interphase
(b) at the beginning of the interphase
(c) at the end of the interphase
(d) somewhere during the middle of the interphase
54. Cell cycle is divisible into
(a) karyokinesis and cytokinesis. (b) interphase and prophase
(c) interphase and mitotic phase. (d) M-phase and S-phase
55. Correct sequence of stages in cell cycle is
(a) G1
, S, G2
, M (b) G1
, G2
, S, M (c) M, S, G1
, G2
(d) G2
, G1
, M, S
56. Condensation of chromosome with visible centromere occurs during
(a) G1
-phase (b) G2
-phase (c) S-phase (d) M-phase
57. Synthesis of RNA and proteins takes place in
(a) M-phase (b) S-phase
(c) G1
-phase (d) G1
and G2
-phases
58. Mitosis is
(a) karyokinesis
(b) cytokinesis
(c) reduction in chromosome number
(d) both (a) and (b)
59. As compared to meiosis, in mitosis
(a) homologous chromosomes form pairs
(b) daughters have half chromosome number
(c) telophase stage is absent
(d) prophase is shorter
60. Cellular structure which always disappears during mitosis or meiosis is
(a) plastids (b) plasma membrane
(c) nucleolus and nuclear envelope. (d) none of the above
61. Chromosomes arrange at equatorial plate of division spindle in
(a) prophase (b) metaphase (c) anaphase (d) telophase
62. Chromosomes can be counted best at the stage of
(a) prophase (b) anaphase (c) metaphase (d) telophase
63. Best stage to observe shape, size and number of chromosomes is
(a) interphase (b) metaphase (c) prophase (d) telophase
64. Spindle fi bres are made up of
(a) proteins (b) lipids (c) cellulose (d) pectin
65. Mitotic spindle is mainly composed of the protein
(a) actin (b) actomyosin (c) tubulin (d) myoglobin
66. Separation of daughter chromosomes occurs in
(a) the beginning of anaphase (b) metaphase
(c) late prophase (d) early prophase
67. At which stage of mitosis, chromatids separate and start moving towards poles?
(a) Prophase (b) Metaphase (c) Anaphase (d) Telophase
68. Mitotic anaphase diff ers from metaphase in possessing
(a) same number of chromosomes and half number of chromatids
(b) half number of chromosomes and same number of chromatids
(c) half number of chromosomes and half number of chromatids
(d) same number of chromosomes and same number of chromatid
69. Animal cells undergo cytokinesis by
(a) furrowing
(b) cell plate
(c) both (a) and (b)
(d) furrowing and followed by deposition of special materials
70. Signifi cance of mitosis lies in
(a) producing cells genetically similar to parent cell
(b) occurrence in energy tissue of body
(c) increasing cellular mass
(d) swift division
71. Mitosis diff ers from meiosis in
(a) forming four haploid cells
(b) pairing of homologous chromosomes and their subsequent separation
(c) doubling of each chromosome and each pair showing four chromatids
(d) duplication of chromosomes and subsequent separation of the duplicates
72. Number of chromosomes present in pollen grains is six. What shall be their number in leaf
cells?
(a) 12 (b) 24 (c) 6 (d) 3
73. Meiosis occurs in
(a) liver (b) kidney (c) gonad (d) brain
74. Meiosis is
(a) disjunctional division (b) equational division
(c) multiplicational division. (d) reductional division
76. Meiosis involves
(a) two nuclear divisions and two chromosome divisions
(b) two nuclear divisions and one chromosome division
(c) one nuclear division and one chromosome division
(d) one nuclear division and two chromosome divisions
77. Meiosis occurs in
(a) haploid cells (b) diploid cells
(c) both haploid and diploid cells (d) triploid cells
78. Which of the following statements is correct for meiosis?
(a) First division is equational and second reductional
(b) First division is reductional and second equational
(c) Both divisions are equational
(d) Both divisions are reductional
79. Meiosis can be studied in angiosperm in
(a) root apical meristem (b) shoot apical meristern
(c) dividing cells of vascular cambium (d) dividing pollen mother cells in anther
80. How many meiotic divisions are necessary to produce 600 pollen grains?
(a) 50 (b) 100 (c) 150 (d) 300
81. Before undergoing meiosis, the amount of DNA of a cell
(a) become halves (b) become doubles
(c) remains same (d) become quadruples
82. Which of the following represents the correct order in Prophase I?
(a) Zygotene, diplotene, pachytene, leptotene, diakinesis
(b) Diakinesis, diplotene, leptotene, pachytene, zygotene
(c) Leptotene, zygotene, pachytene, diplotene, diakinesis
(d) Pachytene, leptotene, zygotene, diplotene, diakinesis
83. In which stage of meiosis, chromosome is thin, long, and thread-like?
(a) Leptotene (b) Zygotene (c) Pachytene (d) Diakinesis
84. Synaptonemal complex has a role in
(a) chromosome pairing (b) chromosome movement
(c) chromosome segregation. (d) chromosome organization
85. Synaptonemal complex is formed during
(a) cytokinesis (b) amitosis (c) mitosis (d) meiosis
86. Bivalents are formed during
(a) diplotene (b) pachytene (c) zygotene (d) leptotene
87. Tetrad is made of
(a) four nonhomologous chromatids
(b) four nonhomologous chromosomes
(c) four homologous chromosomes with four chromatids
(d) two homologous chromosomes and each with two chromatids
88. Exchange of paternal and maternal chromosome material during cell division is
(a) dyad formation (b) crossing over
(c) synapsis (d) bivalent formation
89. Transfer of genes from one chromosome to another and vice versa during synapsis is called
(a) crossing over (b) exchange (c) chiasma (d) translocation
90. Repulsion of homologous chromosomes takes place in
(a) diplotene (b) zygotene (c) diakinesis (d) leptotene
91. When are chromatids clearly visible in meiosis?
(a) Zygotene (b) Pachytene (c) Diplotene (d) Diakinesis
92. Chiasma formation occurs in
(a) leptotene (b) zygotene (c) pachytene (d) diplotene
93. Cross-like confi guration when nonsister chromatids of a bivalent come in contact during fi rst
meiotic division are
(a) chiasmata (b) bivalents (c) chromomeres (d) centromeres
94. Terminalisation occurs during
(a) mitosis (b) diakinesis (c) cytokinesis (d) meiosis II
95. Number of chromosome groups at equatorial plate of metaphase I of a plant body having
2n = 50 chromosomes shall be
(a) 100 (b) 75 (c) 50 (d) 25
96. In meiosis I, the centromere undergoes
(a) no division
(b) division between anaphase and interphase
(c) division between prophase and metaphase
(d) division but the daughter chromosomes do not separate
97. Meiosis II performs
(a) synthesis of DNA and centromere
(b) separation of sex chromosomes
(c) separation of chromatids
(d) separation of homologous chromosomes
98. Signifi cance of meiosis lies in the
(a) reduction of chromosome number to one half
(b) maintaining constancy of chromosome number during sexual reproduction
(c) production of genetic variability
(d) all of these
99. 200 egg cells are produced by (in meiosis)
(a) 50 divisions (b) 100 divisions (c) 200 divisions (d) 400 divisions
100. A cell has 23 pairs of chromosomes just after the completion of mitotic telophase. The number
of chromatids at the preceding metaphase was
(a) 23 (b) 46 (c) 69 (d) 92
101. In plant cells, cytokinesis occurs by
(a) furrowing (b) invagination
(c) anticlinal division (d) cell plate formation
102. The phase of cell cycle during which ‘DNA polymerase’ is functionally active is
(a) S (b) G2
(c) G1
(d) M
103. The number of mitotic divisions required to produce 128 cells from a single cell is
(a) 7 (b) 14 (c) 8 (d) 36
104. Which statement is correct for meiosis?
(a) Meiosis I is reduction division
(b) Meiosis II is reduction division
(c) Meiosis I and II are both reduction divisions
(d) None of the above
105. Which of the following is the longest phase of meiosis?
(a) Prophase I (b) Anaphase I (c) Prophase II (d) Metaphase II
107. G1
-phase is
(a) end of mitosis and start of S-phase
(b) end of S-phase and start of mitosis
(c) start of S-phase and start of mitosis
(d) end of S-phase and end of mitosis
108. At which stage of mitosis chromatids separate and pass to diff erent poles?
(a) Prophase (b) Metaphase (c) Anaphase (d) Telophase
109. During meiosis, crossing over occurs between
(a) sister chromatids of homologous chromosomes
(b) non-sister chromatids of homologous chromosomes
(c) sister chromatids of non-homologous chromosomes
(d) non-homologous chromatids of homologous chromosomes
110. Which of the following is not true for anaphase?
(a) Golgi body and ER are reformed
(b) Spindle poles move farther apart
(c) Chromosomes move to opposite poles
(d) Centromeres split and chromatids separate
111. The longest phase of meiosis I is
(a) Metaphase-I (b) Prophase-I (c) Anaphase-I (d) Telophase-I
112. Cyclin protein is required for cell cycle. Which other molecule is essential for the completion
of cell cycle?
(a) CCK (b) CKc (c) CdK (d) CKd
113. Pick out the correct statements from the following:
I. Synapsis of homologous chromosomes takes place during prophase I of meiosis.
II. Division of centromeres takes place during anaphase I of meiosis.
III. Spindle fi bres disappear completely in telophase of mitosis.
IV. Nucleoli reappear at telophase I of meiosis.
(a) I only (b) III only (c) I and II only (d) I, III and IV only
Answer Keys -
1. (a) 2. (c) 3. (d) 4. (a) 5. (a) 6. (b) 7. (a) 8. (a) 9. (d) 10. (b)
11. (c) 12. (d) 13. (d) 14. (c) 15. (b) 16. (c) 17. (b) 18. (d) 19. (d) 20. (d)
21. (d) 22. (c) 23. (d) 24. (c) 25. (d) 26. (d) 27. (d) 28. (d) 29. (d) 30. (a)
31. (c) 32. (d) 33. (d) 34. (d) 35. (a) 36. (c) 37. (d) 38. (a) 39. (c) 40. (d)
41. (b) 42. (d) 43. (d) 44. (d) 45. (a) 46. (a) 47. (a) 48. (b) 49. (d) 50. (c)
51. (b) 52. (c) 53. (d) 54. (c) 55. (a) 56. (d) 57. (d) 58. (d) 59. (d) 60. (c)
61. (b) 62. (c) 63. (b) 64. (a) 65. (c) 66. (a) 67. (c) 68. (a) 69. (a) 70. (a)
71. (d) 72. (a) 73. (c) 74. (d) 75. (b) 76. (b) 77. (b) 78. (b) 79. (d) 80. (c)
81. (b) 82. (c) 83. (a) 84. (a) 85. (d) 86. (c) 87. (d) 88. (b) 89. (a) 90. (a)
91. (b) 92. (d) 93. (a) 94. (b) 95. (d) 96. (a) 97. (c) 98. (d) 99. (c) 100. (d)
101. (d) 102. (a) 103. (a) 104. (a) 105. (a) 106. (d) 107. (a) 108. (c) 109. (b) 110. (a)
111. (b) 112. (c) 113. (d)
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