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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
B.Sc.DEGREE EXAMINATION -PLANT BIOLOGY AND PLANT BIOTECHNOLOGY
THIRD SEMESTER APRIL 2018
16UPB3MC02- CELL BIOLOGY AND EVOLUTION
Date: 07-05-2018 Dept. No. Max. 100 Marks
Time: 09:00-12:00
PART- A
Answer the following, each within 50 words. (10×2=20marks)
1. What is protoplasm?
2. Write notes on cell theory.
3. What are dictyosomes? Enumerate its components.
4. What are ergastic substances?
5. What is Idiogram.
6. What is a telomere.
7. Define karyokinensis.
8. What are viral vaccines?
9. State Darwin's postulates.
10. Comment on Neo Darwinism.
PART- B
Answer the following, each within 500 words. Draw diagrams and flowcharts wherever necessary. (5×7=35marks)
11. (a)Explain the structure of a prokaryotic cell.
OR
(b)Enumerate the uses of microscopy in the field of cytology .
12. (a)Discuss the fluid mosaic model of plasma membrane.
OR
(b)Explain the structure and functions of endoplasmic reticulum.
13. (a)Write notes on formation of nucleosome.
OR
Elaborate the ultrastructure of chromosome.
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14. (a)Describe amitosis and add a note on mitotic abnormalities.
OR
(b)What are the various sub phases of prophase in meiosis I.
15. (a)What is speciation? Add a note on its types.
OR
(b)Explain the use and disuse theory.
PART- C
Answer any three of the following, each within 1200 words. Draw diagrams and flowcharts wherever necessary. (3×15=45 Marks)
16. Explain the working principle and mechanism of TEM.
17. Describe the ultrastructure of mitochondria and elaborate on its functions.
18. Give a comparative account on lampbrush and polytene chromosomes.
19. What is a cell cycle? Add a note on the various phases of mitosis.
20. Write an essay on the various concepts on Origin of life.