MCQ CELL DIVISION
1. An event not occurs in Anaphase-I but occurs in Anaphase-II is
1) Condensation of chromosomes 2) Poleward movement of chromosome
3) Contraction of spindle fibres 4) Splitting of centromere
2. During G2 – phase of cell cycle a diploid cell contains the amount of DNA equal to a
1) Diploid cell 2) Tetraploid cell 3) Haploid cell 4) Nothing can be said
3. In which of the following phase crossing over occurs
1) Zygotene 2) Pachytene 3) Diplotene 4) Diakinesis
4. During the cytokinesis of which group forms a contractile mid body
1) Animals 2) Higher plants 3) Fungi 4) Algae
5. In which direction cytokinesis occurs in plants
1) Centripetal 2) Centrifugal 3) Oblique 4) Equatorial
6. Which of the following events restore the normal number of chromosomes in life cycle?
1) Mitosis and Meiosis 2) Meiosis and fertilisation
3) Fertilisation and mitosis 4) Only meiosis
7. Match the column A with column B and select the correct answer
Column A | Column B |
A | Pachytene | i. | Bouquet stage |
B | Zygotene | ii. | Chiasma visible |
C | Diplotene | iii. | Terminalisation |
D | Leptotene | iv | Gene exchange |
E | Diakinesis | v | Synapsis |
1) A-i, B-ii, C-iii, D-iv, E-v 2) A-iv, B-v, C-ii, D-i, E-iii
3) A-iii, B-iv, C-v, D-ii, E-i 4) A-ii, B-iii, C-iv, D-i, E-v
8. Which of the plant part is commonly used for the study of meiosis
1) Root apex 2) Ovary 3) Anther 4) Shoot apex
9. Chromosomal movement in Anaphase is assisted by
1) Astral rays 2) Centrioles 3) NOR 4) Spindle fibres
10. In which of the following phase the nuclear envelope reappears
1) Metaphase 2) Prophase 3) Anaphase 4) Telophase
11. Movement of of chiasmata towards the ends of bivalent is called
1) Terminalisation 2) Diakinesis 3) Interkinesis 4) Heteropycnosis
12. During meiosis, how many cycles of chromosome division occurs?
1) One 2) Four 3) Two 4) Three
13. Which of the following events does not occurs in prophase?
1) Decondensation of chromatin
2) Condensationof chromatin
3) Appearance of chromosome
4) Disappearance of nuclear membrane and nucleolus
14. In which of the following stage of cell division, number of chromosomes best counted
1) Prophase 2) Metaphase 3) Telophase 4) Interphase
15. How many chromosome shall be present in a diploid cell at mitotic anaphase if its egg cell has 4 chromosome
1) 4 (four) 2) 8 (eight) 3) 12 (twelve) 4) 16 (Sixteen)
16. High level of chromosome coiling exhibits during
1) Prophase 2) Metaphase 3) Telophase 4) Interphase
17. In which sub stage of prophase-I the “Bouquet-stage” occur ?
1) Leptotene 2) Zygotene 3) Pachytene 4) Diplotene
18. During anaphase – II of meiosis each chromosome contains
1) 4 DNA 2) 3-DNA 3) 2-DNA 4) 1-DNA
19. The chromosomes are composed of two chromatids in ?
1) Prophase & metaphase 2) Anaphase and telophase
3) Prophase and telophase 4) Metaphase and anaphase
20. Each chromosome composed of ……………………..in Anaphase – I
1) One chromatid 2) Two chromatid 3) Four chromatid 4) Many chromatid
21. Gap phase between division phase and start of DNA-replication is called
1) G1 – phase 2) G2 – phase 3) M – Phase 4) Interkinesis
22. In meiosis, Division of centromere occurs during
1) Interphase 2) Anaphase – I 3) Anaphase – II 4) Metaphase – I
23. In meiosis, nuclear membrane and nucleolus disappear during
1) Zygotene 2) Pachytene 3) Diakinesis 4) Metaphase – I
24. In cell cycle, which stage is misnomerly called resting phase
1) S-phase 2) Telophase 3) Cytokinesis 4) Interphase
25. Separation of homologous chromosomes during anaphase – I is called
1) Synapsis 2) Disjunction 3) Nondisjunction 4) Crossing over
26. During cell division, spindle fibres attach to which part of chromosome
1) Primary constriction 2) Sec. Constriction
3) Chromomere 4) Chromatid
27. Diakinesis represents
1) transition to prophase 2) transition of metaphase
3) transition to anaphase 4) transition to telophase
28. Synaptonemal complex is characteristic of
1) Mitotic chromosomes 2) Leptotene chromosomes
3) paired meiotic chromosomes 4) Metaphase
29. During which stage a diploid cell becomes tetraploid in mitosis
1) G2 2) Prophase 3) Metaphase 4) Anaphase
30. Division of centromere occurs in
1) Prophase 2) Metaphase 3) Anaphase 4) Telophase
31. Each chromosome composed of one chromatid in
1) Anaphase – I 2)Anaphase – II 3) Metaphase – I 4) Metaphase – II
32. 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
1) 8 and 4 2) 4 and 4 3) 8 and 8 4) 16 and 8
33. Which one of the following statements is correct?
1) Cell divided by cytokinesis only mitosis
2) DNA is replicated before the start of meiosis only
3) Spindles consisting of microtubules are formed only in mitosis
4) Exchange of genetic materials occurs only in meiosis
34. Which of the following not occurs in Anaphase – I
1) Segregation of homologous chromosomes 2) Shortening in spindle
3) Poleward movement of chromosomes 4) Division of centromere
35. In meiosis
1) Division of nucleus twice but replication of DNA only once
2) Division of nucleus twice and replication of DNA twice
3) Division of nucleus once and replication of DNAis also once
4) Division of nucleus once and DNA replication is twice
36. After meiosis – I, the two chromatids of a chromosome are
1) Genetically similar
2) Genetically different
3) There occurs only one chromatid in each chromosome
4) None of the above
37. Chiasmata appears during
1) Diakinesis 2) Synaptotene 3) Diplotene 4) Leptotene
38. What happens in synthesis phase during cell cycle
1) DNA synthesis 2) Chromosome number becomes double
3) Formation of two nuclei 4) Synthesis of tubulin proteins
39. Reappearance of nuclear membrane & nucleolus along with thining and elongation in chromosomes are diagnostic characters for the phase
1) Anaphase 2) Metaphase
3) Formation of two nuclei 4) Synthesis of tubulin proteins
39. Reappearance of nuclear membrane and nucleolus along with thining & elongation in chromosomes are diagnostic characters for the phase
1) Anaphase 2) Metaphase 3) Interphase 4) Telophase
40. Condensation of chromosomes and appearance of astral rays occurs during
1) Prophase 2) Metaphase 3) Anaphase 4) Telophase
41. During telophase
1) Nuclear membrane is formed 2) Nucleolus appears
3) Astral rays disappear 4) All the above
42. Chromosomal morphology (Structure) is best observed at
1) Prophase 2) Metaphase 3) Interphase 4) Anaphase
43. Pairing of homologous chromosomes in called
1) Disjunction 2) Synapsis 3) Segregation 4) Polyteny
44. Preparation phase of mitosis is
1) G1-Phase 2) S-phase 3) Prophase 4) Interphase
45. Synaptonemal complex first appear
1) Leptotene 2) Pachytene 3) Zygotene 4) Diplotene
46. The correct sequence of prophase-I of meiosis is
1) Leptotene, pachytene, zygotene, diplotene, diakinesis
2) Leptotene, diplotene, pachytene, zygotene, diakinesis
3) Leptotene,zygotene, pachytene, diplotene, diakinesis
4) Leptotene, zygotene, diakinesis, diplotene
47. M-phase of cell cycle consist of
1) G1, S and G2 phase
2) Prophase, Metaphase, Anaphase, Telophase
3) Interphase, Prophase, Metaphase, Anaphase, Telophase
4) Only prophase
48. If the cell is diploid in G1 than after the 5 phase cell remain/become
1) n 2) 4n 3) 8n 4) 2n
49. Nuclear membrane disappears in
1) Late prophase 2) Early prophase 3) Metaphase 4) Telophase
50. Pre-DNA synthesis phase is
1) G1 – phase 2) G2 – phase 3) S – phase 4) Prophase
51. Synapsis occurs between
1) Two homologus chromosomes 2) A male and a female gamete
3) mRNA and ribosomes 4) Spindle fibres and centromere
52. Synapsis occurs during:
1) Leptotene 2) Zygotene 3) Pachytene 4) Diplotene
53. During mitosis ER and nucleolus begin to disappear at:
1) Early prophase 2) Late prophase 3) Early metaphase 4) Lat e metaphase
54. Which stages of cell division do segregation of chromosome and condensation of chromatin respectively occurs?
1) Prophase – Anaphase 2) Metaphase – Telophase
3) Telophase – Metaphase 4) Late Anaphase – Prophase
55. Select the correct option with respect to mitosis
1) Chromatids separate but remain in the centre of the cell in anaphase
2) Chromatids start moving towards opposite poles in telophase
3) Golgi complex and endoplasmic reticulum are still visible at the end of prophase
4) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
56. At metaphase, chromosomes are attached to the spindle fibres by their
1) Centromere 2) Satellites
3) Secondary constrictions 4) Kinetochores
57. Meiosis is not having the one of the character out of the four given below
1) It involves two stages of DNA replication, one before meiosis-I and another before meiosis-II
2) It involves recombination and crossing over
3) Sister chromatids separate during anapahase-II
5) Nuclear membrane disappears during prophase
58. During gamete formation, the enzyme recombinase participates during
1) Prophase – I 2) Prophase – II 3) Metaphase – I 4) Anaphase II
59. Identify the stage in which crossing over occurs
1) Prophase of Mitosis 2) Both prophase and metaphase of mitosis
3) Prophase I during meiosis 4) Prophase II during meiosis
60. Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres
1) Anaphase I 2) Anaphase II 3) Metaphase I 4) Metaphase
61. Which of the following is wrong about G1 phase?
1) G-1 stage followed by Mitosis 2) Cell is metabolically active
3) Cell grows continuously 4) Cell does not replicate its DNA
62. Select the answer which gives correct identification of the stage with its characteristics.
1) | Telophase | Endoplasmic reticulum and nucleolus not reformed yet . |
2) | Telophase | Nuclear envelop reforms golgi complex reforms |
3) | Late anaphase | Chromosomes move a away from equatorial plate, golgi complex not present |
4) | Cytokinasis | Cell plate formed, mitochondria distributed between two daughter cells |
63. The complex formed by a pair of synapsed homologous chromosomes is called
1) Axoneme 2) Equatorial plate 3) Kinetochore 4) Bivalent
64. In which phase of cell cycle the amount of DNA in a diploid cell become four times as compared to a haploid cell?
1) G1 2) S 3) G2, S & M 4) G°
65. During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?
1) G0 and G1 2) G1 and S 3) Only G2 4) G2 and M
66. In ‘S’ phase of the cell cycle?
1) Amount of DNA doubles in each cell 2) Amount of DNA remains same in each cell
3) Chromosome number is increased 4) Amount of DNA is reduced to half in each cell
67. The enzyme recombinase is required at which stage of meiosis:
1) Pachytene 2) Zygotene 3) Diplotene 4) Diakinesis
68. Which of the following is longest phase of the cell cycle?
1) Prophase 2) Interphase 3) Telophase 4) M – phase
69. A somatic cell that has just completed the S phase os its cell cycle, as compared to gamete of the same species, has:
1) same number of chromosomes but twice the amount of DNA
2) twice the number of chromosomes and four times the amount of DNA
3) four times number of chromosomes and twice the amount of DNA
4) twice the number of chromosomes and twice the amount of DNA
70. Arrange the following events of meiosis in correct sequence:
a) crossing over b) Synapsis
c) Terminalisation of chaismata 4) Disappearance of nucleolus
1) b, c, d, a 2) b, a, d, c 3) b, a, c, d 4) a, b, c, d
71. Which one is correct for G0 stage?
I. is a quiescent stage
II. In this phase cell cycle is stopped
III. G0 cells do not grow or proliferate but metabolically active
IV. G0 cells can divide in response to some stimulus
1) All are correct 2) I, II, III are correct
3) I, II are correct 4) Only I and IV are correct
72. Which of the following is not correctly matches a phase of the cell cycle with its function?
1) Second gap phase – Period of cytoplasmic growth
2) First gap phase – Most of the organelle duplication
3) Interphase – Phase of preparation for cell division
4) DNA synthesis phase – Doubling of number of chromosome in cell
73. Mark incorrect statements
A) meiosis involves only a single cycle of DNA replication
B) Four haploid cells are formed at the end of meiosis – I
C) Meiosis occurs in diploid cells
D) In yeast, cell cycle takes about 90 minutes
1) A and B 2) A and C 3) Only B 4) All are correct
74. Interval between mitosis and initiation of DNA replication is called
1) G2 – Phase 2) G1 – Phase 3) Karyokinesis 4) S – phase
75. Diploid cell in human, where cell division does not occur
a) Heart cell b) Muscle cell c) Nerve cell
1) Only c 2) b and c 3) a and c 4) a, b and c
76. The events shown below occur during different phases
A. Centromere splits, chromatidsseparate and move to opposite poles, chromatids are now celled chromosome
B. Chromosomes cluster at opposite poles, decondensation of chromosome, reappearance of NM, GB and ER
C. Chromosome are arranged at equatorial plate
D. Kinetochores are arranged at equatorial plate
E. Condensation of chromosomal materials
Which of the following correctly indentifies each of the phases described
| Interphase | Prophase | Metaphase | Anaphase | Telophase |
1) | C | E | D | A | B |
2) | C | D | E | A | B |
3) | C | E | D | B | A |
4) | C | A | D | E | B |
77. Arrange the following events of meiosis in the correct sequence-
A. Terminalisation of chiasmata
B. Crossing over
C. Synapsis
D. Disjunction of chromosomes
E. Dissolution of synaptonemal complex
The correct sequence is-
1) A®B®C®D®E 2) E®D®C®B®A 3) C®B®D®E®A 4) C®B®E®A®D
78. The anaphase of mitosis differs from metaphase in:
(a) Half the number of chromosomes
(b) Half the number of chromatids in each chromosome
(c) Half the number of chromosomes but doubles the number of chromatids in
each chromosome
(d) Half the number of chromosomes and half the number of chromatids in each
chromosome.
79. Chromosome in equtorial plane is seen during
1) Metaphase of mitosis 2) Anaphase of mitosis
3) First anaphase of meiosis 4) Second anaphase of meiosis
80. The correct sequence of Prophase I is
1) Diplotene>Pachytene>Diakinesis>Zygotene>Leptotene>Pre-leptotene
2) Leptotene>Pachytene>Diakinesis>Zygotene >Pre-leptotene> Diplotene
3) Leptotene >Diakinesis>Zygotene >Pre-leptotene> Diplotene> Pachytene
4) Pre-leptotene>Leptotene>Zygotene>Pachytene>Diplotene>Diakinesis
81. A cell has 46 chromosomes at each pole in mitotic telophase. In this division the number of chromatids at the metaphase was:-
1) 23 2) 46 3) 92 4) 69
82. A mouse cell is treated with a chemical that interferes with the activity of microfilaments. Which
of the following will probably be affected the most?
1) Formation of spindle fibres 2) Division of cytoplasm
3) Chromosome duplication 4) Pairing of homologous chromosomes
83. Number of chromosome pairs at equator in metaphase-I of a diploid plant cell (n=25
chromosomes) shall be-
1) 50 2) 100 3) 75 4) 25
84. How many meiotic divisions are required during the formation of 500 zygotes, if in males one
meiotic division results in formation of four male gametes and in females one meiotic division
results in formation of one female gamete?
1) 625 2) 500 3) 1000 4) 2500
85. Number of chromatids in each chromosome at anaphase is-
1) One in mitosis, one in meiosis-I and two in meiosis-II
2) One in mitosis, two in meiosis-I and one in meiosis-II
3) Two in mitosis, one in meiosis-I and two in meiosis-II
4) Two in mitosis, two in meiosis-I and two in meiosis-II
86. In which of the following stages of mitosis, chromosomes are most condensed?
1) Stage between the stage of cell plate formation and stage of DNA replication
2) Stage between the stage of centrioles separation and stage of splitting of centromere
3) Stage between the stage of DNA replication and stage of initiation of condensation of
chromatin
4) Stage between the stage of metaphase plate formation and stage of decondensation of
chromosomes
87. If the cell had diploid or 2n number of chromosomes at G1, after S phase the number of
chromosomes in the cell is?
1) 2 n 2) 4 n 3) n 4) 3n
88.Name the cell division in A -Gamete formation and B-body growth
1) A®Meiosis-II, B®Meiosis-I 2) A®Mitosis, B®Meiosis-I
3) A®Meiosis, B®Mitosis 4) A®Mitosis, B®Meiosis
89. In a diploid cell Before S-phase quantity of DNA is 20 pico gram (pg) in a diploid cell.What will be the quantity of DNA in each daughter cell after meiosis I ?
1) 10 pg 2) 20 pg 3) 5 pg 4) 40 pg
90. How many cycles of nucleus division, DNA replication and division of centromere
take place respectively during meiosis :-
1) Three, Two, One 2) One, Two, Two 3) Two, Two, One 4) Two, One, One
KEY
1. 4) Splitting of centromere
2. 2) Tetraploid cell
3. 2) Pachytene
4. 1) Animals
5. 2) Centrifugal
6. 2) Meiosis and fertilisation
7. 2) A-iv, B-v, C-ii, D-i, E-iii
8. 3) Anther
9. 4) Spindle fibres
10. 4) Telophase
11. 1) Terminalisation
12. 1) One
13. 1) Decondensation of chromatin
14. 2) Metaphase
15. 4) 16 (Sixteen)
16. 2) Metaphase
17. 1) Leptotene
18. 18.4) 1-DNA
19. 1) Prophase & metaphase
20. 2) Two chromatid
21. 1) G1 – phase
22. 3) Anaphase – II
23. 3) Diakinesis
24. 4) Interphase
25. 2) Disjunction
26. 1) Primary constriction
27. 2) transition of metaphase
28. 3) paired meiotic chromosomes
29. 4) Anaphase
30. 3) Anaphase
31. 2)Anaphase – II
32. 3) 8 and 8
33. 4) Exchange of genetic materials occurs only in meiosis
34. 4) Division of centromere
35. 1) Division of nucleus twice but replication of DNA only once
36. 2) Genetically different
37. 1) Diakinesis
38 .3) Formation of two nuclei
39. 1) Anaphase
39. 4) Telophase
40. 1) Prophase
41. 4) All the above
42. 2) Metaphase
43. 2) Synapsis
44. 4) Interphase
45. 3) Zygotene
46. 3) Leptotene,zygotene, pachytene, diplotene, diakinesis
47. 2) Prophase, Metaphase, Anaphase, Telophase
48 .4) 2n
49. 1) Late prophase
50. 1) G1 – phase
51. 1) Two homologus chromosomes
52. 2) Zygotene
53. 2) Late prophase
54. 4) Late Anaphase – Prophase
55. 4) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
56. 4) Kinetochores
57. 1) It involves two stages of DNA replication, one before meiosis-I and another before meiosis-II
58. 1) Prophase – I
59. 3) Prophase I during meiosis
60. 1) Anaphase I
61. 1) G-1 stage followed by Mitosis
62. 2) Telophase Nuclear envelop reforms golgi complex reforms
63. 4) Bivalent
64. 2) S
65. 4) G2 and M
66. 1) Amount of DNA doubles in each cell
67. 1) Pachytene
68 .2) Interphase
69. 2) twice the number of chromosomes and four times the amount of DNA
70. 3) b, a, c, d
71. 1) All are correct
72. 4) DNA synthesis phase – Doubling of number of chromosome in cell
73. 3) Only B
74. 2) G1 – Phase
75. 4) a, b and c
76.
| Interphase | Prophase | Metaphase | Anaphase | Telophase |
1) | C | E | D | A | B |
77. 4) C®B®E®A®D
78. (b) Half the number of chromatids in each chromosome
79. 3)First anaphase of meiosis
80. 4) Pre-leptotene>Leptotene>Zygotene>Pachytene>Diplotene>Diakinesis
81. 3) 92
82. 2) Division of cytoplasm
83. 4) 25
84. 1) 625
85. 2) One in mitosis, two in meiosis-I and one in meiosis-II
86. 2) Stage between the stage of centrioles separation and stage of splitting of centromere
87. 1) 2 n
88. 3) A®Meiosis, B®Mitosis
89. 2) 20 pg
90. 4) Two, One, One
