CBSE Class 11 Cell Cycle and Cell Division Worksheet B

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Question. Nuclear membrane disappears in :-
(a) Late prophase
(b) Early prophase
(c) Metaphase
(d) Telophase
Answer.A 

Question. M-phase of cell cycle consist of :-
(a) G1, S and G2 phase
(b) Prophase, Metaphase, Anaphase, Telophase
(c) Interphase, Prophase, Metaphase, Anaphase,Telophase
(d) Only prophase
Answer.B

Question. If the cell is diploid in G1 than after the S phase cell remain/become :-
(a) n
(b) 4n
(c) 8n
(d) 2n
Answer.D

Question. Each chromosome composed of one chromatid in:-
(a) Anaphase - I
(b) Anaphase - II
(c) Metaphase - I
(d) Metaphase - II
Answer.B

Question. A contractile mid body forms during cytokinesis in :-
(a) Animals
(b) Higher plants
(c) Fungi
(d) Algae
Answer.A

Question. Which one of the following statements is correct ?
(a) Cell divided by cytokinesis only in mitosis
(b) DNA is replicated before the start of meiosis only
(c) Spindles consisting of microtubules are formed only in mitosis
(d) Exchange of genetic materials occurs only in meiosis
Answer.D

Question. Which of the following not occurs in Anaphase -I
(a) Segregation of homologous chromosomes
(b) Shortening in spindle
(c) Poleward movement of chromosomes
(d) Division of centromere
Answer.D 

Question. Chiasmata appears during :-
(a) Diakinesis
(b) Synaptotene
(c) Diplotene
(d) Leptotene
Answer.C

Question. Pre - DNA synthesis phase is:-
(a) G1 - phase
(b) G2 - phase
(c) S-phase
(d) Prophase
Answer.A

Question. What happens in synthesis phase during cell cycle:-
(a) DNA synthesis
(b) Chromosome number becomes double
(c) Formation of two nuclei
(d) Synthesis of tubulin proteins
Answer.A

Question. Reappearance of nuclear membrane & nucleolus along with thining & elongation in chromosomes are diagnostic characters for the phase:-
(a) Anaphase
(b) Metaphase
(c) Interphase
(d) Telophase
Answer.D

Question. During telophase :-
(a) Nuclear membrane is formed
(b) Nucleolus appears
(c) Astral rays disappear
(d) All the above
Answer.D

Question. Crossing over takes place in :-
(a) Zygotene
(b) Pachytene
(c) Diplotene
(d) Diakinesis
Answer.B

Question. Pairing of homologous chromosomes is called:-
(a) Disjunction
(b) Synapsis
(c) Segregation
(d) Polyteny
Answer.B

Question.Condensation of chromosomes and appearance of astral rays occur during :-
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase
Answer.A

Question. Preparation phase of mitosis is :-
(a) G1-phase
(b) S-phase
(c) Prophase
(d) Interphase
Answer.D

Question. Synaptonemal complex first appear :-
(a) Leptotene
(b) Pachytene
(c) Zygotene
(d) Diplotene
Answer.C

Question. The correct sequence of prophase-I of meiosis is :-
(a) Leptotene, pachytene, zygotene, diplotene,diakinesis
(b) Leptotene, diplotene, pachytene, zygotene,diakinesis
(c) Leptotene, zygotene, pachytene, diplotene,diakinesis
(d) Leptotene, zygotene, diakinesis, diplotene
Answer.C 

Question. During which stage a diploid cell becomes tetraploid in mitosis:-
(a) G2
(b) Prophase
(c) Metaphase
(d) Anaphase
Answer.D

More Questions

1. At which stage of meiosis crossing over of genetic material takes place?

2. What is Go phase?

3. Name the cell division concerned with cancer?

4. Why is meiosis called reductional division & mitosis called equational division?

5. Write three processes which take place in interphase?

6. Enumerate the significance of mitosis?

7. Write six differences between mitosis & meiosis?

8. What are homologous chromosomes? What happens to homologous chromosomes during meiosis ?

9. What is mitosis? Give a brief account of mitosis in animal cell?

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