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CBSE BIOLOGY-XI

SECTION-A

1. What is meiocyte?2. In which phase of the interphase, the DNA contents of the cell become double?
3. What are dictyosomes?
4. What does Omnis cellula-e-cellula means?
5. Which polysaccharide constitutes the cell wall in fungi?

                                                                     SECTION-B

6. Who proposed the cell theory? List its postulates.

7. Draw a neat and labeled diagram of plastid.

8. What is synaptonemal complex? Give its significance.

SECTION-C

9. Describe the ultra structure of nucleus. Give its two functions.

10. Compare a plant cell and an animal cell.

11. Why plasma membrane is called semi permeable membrane? Give its significance.

SECTION-D

12. i) Describe the following-a) Synapsis

b) Bivalent

c) ChiasmataDraw a diagram to illustrate your answer. 
ii) Discuss prophase-1 of meiosis -1 with the help of well labeled sketches.