Class 11 Biology Chapter 10: Cell Cycle and Cell Division – 100 MCQs with Answers
1. The first phase of cell cycle is:
Answer: A) G1 phase
2. DNA replication occurs during:
Answer: B) S phase
3. The resting phase of cell cycle is:
Answer: A) Interphase
4. Mitosis results in:
Answer: B) Formation of two identical cells
5. Chromosomes are first visible in:
Answer: B) Prophase
6. Spindle fibers attach to chromosomes at:
Answer: B) Kinetochore
7. Crossing over occurs during:
Answer: D) Pachytene
8. Synapsis is formation of:
Answer: C) Bivalent
9. The process of cytoplasmic division is called:
Answer: B) Cytokinesis
10. The longest phase of cell cycle is:
Answer: C) Interphase
11. Chromosomes align at the equator during:
Answer: A) Metaphase
12. The nuclear membrane disappears in:
Answer: B) Prophase
13. Separation of sister chromatids occurs in:
Answer: C) Anaphase
14. Mitosis is also known as:
Answer: A) Equational division
15. Animal cell cytokinesis occurs by:
Answer: B) Furrow formation
16. A plant cell divides by:
Answer: B) Cell plate
17. Synaptonemal complex is seen in:
Answer: A) Prophase I of meiosis
18. Pairing of chromosomes is called:
Answer: B) Synapsis
19. Reduction division refers to:
Answer: B) Meiosis I
20. The phase between two mitotic divisions:
Answer: D) Interphase
21. Crossing over introduces:
Answer: A) Genetic variation
22. In which phase does the cell prepare for mitosis after DNA synthesis?
Answer: C) G2
23. Chromosome numbers in daughter cells formed after mitosis:
Answer: C) Same as parent
24. Chiasmata are first visible in:
Answer: C) Diplotene
25. Karyokinesis means:
Answer: B) Division of nucleus
26. Centromere divides during:
Answer: D) Both A and C
27. All stages of mitosis except cytokinesis constitute:
Answer: B) Karyokinesis
28. The region where crossing over occurs is called:
Answer: B) Chiasmata
29. In meiosis-I, homologous chromosomes separate at:
Answer: A) Anaphase I
30. Each chromosome at anaphase of mitosis has:
Answer: A) One chromatid
31. The G0 phase represents:
Answer: B) Resting/Quiescent phase
32. The centrioles duplicate during:
Answer: B) S
33. Meiotic cell division is also called as:
Answer: A) Reduction division
34. Plant cells lack:
Answer: A) Centrosome
35. The structure responsible for spindle formation in animal cells:
Answer: A) Centrosome
36. Homologous chromosomes are:
Answer: B) Structurally similar, alleles may differ
37. Karyotype refers to:
Answer: A) Number and appearance of chromosomes
38. In meiosis II, the chromosomes align at the center during:
Answer: B) Metaphase II
39. Synaptonemal complex dissolves at:
Answer: B) Diplotene
40. Mitotic apparatus consists of:
Answer: D) All of these
41. Plant mitosis differs from animal mitosis by lacking:
Answer: C) Centriole
42. The nuclear envelope reforms during:
Answer: C) Telophase
43. Somatic cells divide mainly by:
Answer: A) Mitosis
44. G1 and G2 are collectively called:
Answer: B) Interphase
45. Terminalization is associated with:
Answer: C) Diakinesis
46. The spindle fibers attach to:
Answer: C) Kinetochore
47. Cytokinesis is absent in:
Answer: D) Nerve cells
48. Somatic cells are:
Answer: A) Diploid
49. Cells that do not divide after maturity are in:
Answer: C) G0 phase
50. Cell division in bacteria is by:
Answer: B) Binary fission
51. The main reason for genetic diversity in sexually reproducing organisms is:
Answer: B) Crossing over
52. The function of spindle fibers is:
Answer: B) Pull chromosomes
53. Reappearance of nucleolus occurs in:
Answer: B) Telophase
54. Synapsis is complete at:
Answer: B) Pachytene
55. The mitotic spindle is mainly composed of:
Answer: B) Microtubules
56. A cell with 8 chromosomes after mitosis will have:
Answer: B) 8 chromosomes
57. Mitotic divisions are typical in:
Answer: D) Somatic cells
58. Interkinesis refers to:
Answer: A) Gap between meiosis I and II
59. Genetic material is exchanged during:
Answer: C) Crossing over
60. Apoptosis is:
Answer: C) Cell death
61. Plant cells can divide throughout their life because of:
Answer: C) Meristematic tissue
62. Pyrenoids are found in:
Answer: B) Algae
63. Mitosis is important for:
Answer: A) Growth and repair
64. Telophase of mitosis is characterized by:
Answer: B) Formation of two nuclei
65. The process by which interphase and mitosis alternate is termed as:
Answer: A) Cell cycle
66. Bivalents are formed in:
Answer: C) Zygotene
67. Homologous chromosomes are separated during:
Answer: B) Anaphase I of meiosis
68. M-phase is also named as:
Answer: B) Mitosis
69. In meiosis, crossing over starts at:
Answer: A) Pachytene
70. Mitotic cell division cannot occur in:
Answer: A) Prokaryotes
71. Endomitosis is:
Answer: A) Multiplication of nucleus without cell division
72. G1 phase is also called:
Answer: A) Post-mitotic
73. Haploid chromosome number is restored by:
Answer: B) Meiosis
74. The main enzyme for crossing over is:
Answer: B) Recombinase
75. One round of replication and two rounds of division is:
Answer: B) Meiosis
76. Cell cycle was described by:
Answer: C) Howard and Pelc
77. Plant cell division occurs mainly in:
Answer: B) Meristem
78. S phase is significant for:
Answer: A) DNA replication
79. Number of chromosomes become half after:
Answer: B) Meiosis I
80. The cell cycle checkpoints ensure:
Answer: A) Proper division
81. During mitosis, metaphase is followed by:
Answer: C) Anaphase
82. Cells produced by meiosis are:
Answer: D) Haploid
83. A cell undergoing mitosis shows:
Answer: B) Furrow formation
84. DNA replication takes place in:
Answer: A) S phase
85. Meiotic prophase I has:
Answer: C) 5 substages
86. Spindle apparatus mainly forms in:
Answer: A) Prophase
87. Tetrad formation occurs during:
Answer: A) Zygotene
88. In mitosis, the chromatids move toward the poles during:
Answer: B) Anaphase
89. Terminalization involves:
Answer: A) Chiasmata moving toward the end
90. Mitosis helps in:
Answer: D) All of these
91. Plant cell plate develops from:
Answer: B) Golgi vesicles
92. Kinetochore is made up of:
Answer: B) Protein
93. Which stage comes just before cytokinesis?
Answer: A) Telophase
94. Histone proteins are synthesized during:
Answer: B) S phase
95. Nucleolus disappears in:
Answer: A) Prophase
96. In humans, mitosis takes place in:
Answer: A) Somatic cells
97. Crossing over takes place between:
Answer: A) Non-sister chromatids
98. Repetitive cell division without growth results in:
Answer: B) Cleavage
99. In mitosis, DNA content:
Answer: B) Remains same
100. The main significance of meiosis is:
Answer: C) Genetic variation