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Class 11 Biology MCQ Chapter 10 Cell Cycle and cell Division
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Cell Cycle and cell Division
Chapter – 10
| UNIT – (III) CELL: STRUCTURE AND FUNCTION |
| MCQ |
1. In which of these animals does a haploid cell divide mitotically?
(a) Humans.
(b) Male honey bees.
(c) Female honey bees.
(d) Rats.
Ans: (b) Male honey bees.
2. Which of these cells do not divide?
(a) Heart cells.
(b) Melanocytes.
(c) Osteocytes.
(d) Liver cells.
Ans: (a) Heart cells.
3. Which of the following precedes nuclear envelope reformation during the M phase of the cell cycle?
(a) Chromosome decondensation and reassembly of the nuclear lamina.
(b) Decondensation from chromosomes and reassembly of the nuclear lamina.
(c) Contraction ring formation and phragmoplast. Formation.
(d) Contraction ring formation and transcription from chromosomes.
Ans: (b) Decondensation from chromosomes and reassembly of the nuclear lamina.
4. During S phase of the cell cycle, the amount of DNA _____________.
(a) Triples.
(b) Remains the same.
(c) Quadruples.
(d) Doubles.
Ans: (d) Doubles.
5. Which of these processes is not a part of the cell cycle?
(a) Duplication of genome.
(b) Division into daughter cells.
(c) Synthesis of cell organelles.
(d) Degeneration of centrosome.
Ans: (d) Degeneration of centrosome.
6. What is the duration of cell cycle in yeast?
(a) 30 minutes.
(b) 24 hours.
(c) 90 minutes.
(d) 48 hours.
Ans: (c) 90 minutes.
7. The process of appearance of recombination nodules occurs at which substage of prophase I in meiosis?
(a) Diakinesis.
(b) Zygotene.
(c) Pachytene.
(d) Diplotene.
Ans: (c) Pachytene.
8. Which one of the following never occurs during mitotic cell division?
(a) Coiling and condensation chromatids.
(b) Spindle fibers attach to Kinetochores of chromosomes.
(c) Movement of centrioles toward opposite poles.
(d) The pairing of homologous chromosomes.
Ans: (d) The pairing of homologous chromosomes.
9. When do the chromosomes pair during meiosis?
(a) Leptotene.
(b) Zygotene.
(c) Pachytene.
(d) Diplotene
Ans: (b) Zygotene.
10. What is true about the mitotic spindle?
(a) It is composed of actin and myosin microfilaments.
(b) It includes the kinetochore at the metaphase plate.
(c) It is composed of microtubules, which separate chromosomes at opposite poles of the cell.
(d) It originates only from centrioles of centrioles.
Ans: (c) It is composed of microtubules, which separate chromosomes at opposite poles of the cell.
11. _____________ is the best stage to observe the shape, size, and number of chromosomes.
(a) Interphase.
(b) Metaphase.
(c) Prophase.
(d) Telophase.
Ans: (b) Metaphase.
12. The stage which serves as a connecting link between meiosis 1 and meiosis 2.
(a) Interphase.
(b) Interphase.
(c) Interkinesis.
(d) None of the above.
Ans: (c) Interkinesis.
13. What is the longest phase of the cell cycle?
(a) G1 phase.
(b) S phase.
(c) G2 phase.
(d) M phase.
Ans: (a) G1 phase.
14. In which phase does DNA replication occur?
(a) G1 phase.
(b) S phase.
(c) G2 phase.
(d) M phase.
Ans: (b) S phase.
15. What is the main purpose of mitosis?
(a) Formation of gametes.
(b) Growth and repair.
(c) Genetic variation.
(d) Photosynthesis.
Ans: (b) Growth and repair.
