Vidaara.orgClass 11 · Mathematics
CodeVID-M11-WS
Cell Cycle and Cell Division — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
15 × 1 = 15 marks
1.
The orderly sequence by which a cell duplicates and divides is the:
- A.Cell cycle
- B.Carbon cycle
- C.Water cycle
- D.Life cycle
2.
The long preparation stage of the cell cycle is:
- A.M phase
- B.Interphase
- C.Anaphase
- D.Cytokinesis
3.
DNA replication takes place during the:
- A.G1 phase
- B.S phase
- C.G2 phase
- D.M phase
4.
Cells that stop dividing, like mature nerve cells, enter the:
- A.S phase
- B.G0 stage
- C.Metaphase
- D.Anaphase
5.
Division of the nucleus is called:
- A.Cytokinesis
- B.Karyokinesis
- C.Synapsis
- D.Replication
6.
Mitosis is also called:
- A.Reductional division
- B.Equational division
- C.Binary fission
- D.Budding
7.
Chromosomes line up at the equator of the cell during:
- A.Prophase
- B.Metaphase
- C.Anaphase
- D.Telophase
8.
Sister chromatids separate to opposite poles during:
- A.Prophase
- B.Metaphase
- C.Anaphase
- D.Interphase
9.
In plant cells, cytokinesis occurs by formation of a:
- A.Cleavage furrow
- B.Cell plate
- C.Spindle
- D.Nucleolus
10.
Mitosis is important for all the following EXCEPT:
- A.Growth
- B.Repair of tissues
- C.Halving the chromosome number
- D.Replacing worn-out cells
11.
Meiosis produces:
- A.Two diploid cells
- B.Four haploid cells
- C.Two haploid cells
- D.Four diploid cells
12.
Meiosis is also known as:
- A.Equational division
- B.Reductional division
- C.Direct division
- D.Amitosis
13.
Pairing of homologous chromosomes in prophase I is called:
- A.Synapsis
- B.Cytokinesis
- C.Replication
- D.Cleavage
14.
The exchange of segments between homologous chromosomes is:
- A.Crossing over
- B.Translation
- C.Transcription
- D.Budding
15.
A key role of meiosis is to:
- A.Double the chromosome number each generation
- B.Keep the chromosome number constant across generations
- C.Stop variation
- D.Repair skin
Section B — Challenge / Olympiad (2 marks each)
6 × 2 = 12 marks
16.
If a cell has 16 chromosomes before the S phase, how many will it have at the end of the S phase?
- A.8
- B.16 (but each with two chromatids)
- C.32
- D.4
17.
A cell with 24 chromosomes undergoes mitosis. Each daughter cell will have:
- A.12 chromosomes
- B.24 chromosomes
- C.48 chromosomes
- D.6 chromosomes
18.
A cell with 24 chromosomes undergoes meiosis. Each of the four daughter cells will have:
- A.24
- B.12
- C.48
- D.6
19.
Crossing over increases variation because it:
- A.Produces new combinations of parental genes
- B.Doubles the DNA
- C.Removes all genes
- D.Stops the cell cycle
20.
Why is meiosis II often compared to mitosis?
- A.Sister chromatids separate, with no further reduction in number
- B.Homologous chromosomes pair
- C.DNA is copied again
- D.Four cells fuse
21.
If gametes were formed by mitosis instead of meiosis, over generations the chromosome number would:
- A.Stay the same
- B.Keep doubling each generation
- C.Become zero
- D.Halve each generation
Answer Key
Section A — Multiple Choice (1 mark each)
- (A) Cell cycle
- (B) Interphase
- (B) S phase
- (B) G0 stage
- (B) Karyokinesis
- (B) Equational division
- (B) Metaphase
- (C) Anaphase
- (B) Cell plate
- (C) Halving the chromosome number
- (B) Four haploid cells
- (B) Reductional division
- (A) Synapsis
- (A) Crossing over
- (B) Keep the chromosome number constant across generations
Section B — Challenge / Olympiad (2 marks each)
- (B) 16 (but each with two chromatids)
- (B) 24 chromosomes
- (B) 12
- (A) Produces new combinations of parental genes
- (A) Sister chromatids separate, with no further reduction in number
- (B) Keep doubling each generation
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