Biology Class 11th Chapter 10 mcqs

1. Golgi complex and endoplasmic reticulum cannot be seen during

(a) late telophase

(b) late prophase

(c) early anaphase

(d) late metaphase

Answer: (b) late prophase

2. Cell plate grows from

(a) walls to the centre

(b) centre to the walls

(c) in patches

(d) simultaneously

Answer: (b) centre to the walls

3. Choose the correct sequence. A. Chromatin condensation B. Protein synthesis C. Duplication of centrioles D. Centrioles moves towards opposite poles

(a) C, A, B, D

(b) C, B, A, D

(c) C, D, B, A

(d) A, C, D, B

Answer: (b) C, B, A, D

4. If you are provided with root-tips of onion in your class and are asked to count the chromosomes which of the following stages can you most conveniently look into:

(a) Prophase

(b) Anaphase

(c) Telophase

(d) Metaphase

Answer: (d) Metaphase

5. Karyokinesis is the term used for

(a) division of cytoplasm

(b) division of nucleoplasm

(c) division of nucleus

(d) separation of daughter chromosomes

Answer: (d) separation of daughter chromosomes

6. During which stage the chromosomes first become visible.

(a) Anaphase

(b) Metaphase

(c) Prophase

(d) Telophase

Answer: (c) Prophase

7. In mitosis, nuclear envelope and nucleolus disappear during

(a) Metaphase

(b) Interphase

(c) Prophase

(d) Telophase

Answer: (c) Prophase

8. Arrange the following events of meiosis in the correct sequence: I. Terminalization II. Crossing over III. Synapsis IV. Disjunction of genomes The correct sequences:

(a) II, I, IV, III

(b) III, II, I, IV

(c) IV, III, II, I

(d) I, IV, III, II

Answer: (b) III, II, I, IV

9. The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes, is

(a) splitting of the centromeres

(b) splitting of the chromatids

(c) replication of the genetic material

(d) condensation of the chromatin

Answer: (a) splitting of the centromeres

10. What type of plant is formed when colchicine is used in the process of development of Raphanobrassica?

(a) Autotetraploid

(b) Haploid

(c) Triploid

(d) Allotetraploid

Answer: (d) Allotetraploid

11. Meiosis occurs for the human female in ______.

(a) Pancreas

(b) Liver

(c) Ovary

(d) Kidney

Answer: (c) Ovary

12. Choose the correct sequence. A. Pachytene B. Zygotene C. Leptotene D. Diakinesis E. Diplotene

(a) C, B, A, D, E

(b) C, A, B, E, D

(c) C, B, A, E, D

(d) D, B, C, E, A

Answer: (c) C, B, A, E, D

13. How many chromosomes are there in onion root tip cell?

(a) 06

(b) 16

(c) 26

(d) 36

Answer: (b) 16

14. Lampbrush chromosomes are observed in

(a) Mitotic prophase

(b) Mitotic metaphase

(c) Meiotic metaphase

(d) Meiotic prophase

Answer: (d) Meiotic prophase

15. Which of the following cellular structures always disappears during mitosis and meiosis?

(a) Plasma membrane

(b) Nucleolus and nuclear envelope

(c) Plastids

(d) none of these

Answer: (b) Nucleolus and nuclear envelope

16. Centromere is a constituent of

(a) Ribosome

(b) ER

(c) Chromosome

(d) Mitochondrion

Answer: (c) Chromosome

17. In which phase of cell cycle, proteins are synthesised?

(a) G₀

(b) G₁

(c) G₂

(d) S

Answer: (c) G₂

18. The stage in which daughter chromosomes move toward the poles of the spindle is

(a) Anaphase

(b) Metaphase

(c) Prophase

(d) Telophase

Answer: (a) Anaphase

19. Synaptonemal complex dissolves in _____ stage.

(a) Zygotene

(b) Pachytene

(c) Diakinesis

(d) Diplotene

Answer: (d) Diplotene