LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

DB 16

FIFTH SEMESTER – November 2008

CH 5404/CH 5401 – BIO CHEMISTRY

 

 

 

Date : 14-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART A

Answer ALL the questions.                                                                                                             (10 x 2 = 20)

 

1. What are the functions of cytoplasm of the cell?
2. How is the presence of aldehyde group confirmed in glucose?
3. What are essential fatty acids? Give an example.
4. Define iodine number of an oil.
5. Write down the differences between amylose and glycogen.
6. What is glycosidic bond? Give an example.
7. What is respiration? What are the two phases of respiration?
8. Define oxidative phosphorylation.
9. Draw the structure of adenylic acid.
10. What are coenzymes?

PART B

Answer any EIGHT questions.                                                                                                        (8 x 5 = 40)

 

11. Write down the differences between Prokaryotic and Eukaryotic cells.
12. Discuss the β-Oxidation theory of fatty acids.
13. What are phospholipids? Explain the types of phospholipids.
14. Mention any five differences between animal and plant fats.
15. Discuss any five characteristic features of biological oxidation.
16. Explain the classification of carbohydrates with examples.
17. Discuss briefly the phase II of the glycolysis process.
18. Discuss the mechanism of electron transport system.
19. Explain the replication of DNA.
20. Draw and explain the double helical structure of DNA.
21. Explain the steps involved in the translation process of protein synthesis.
22. How is the cyclic structure of glucose elucidated?

 

PART C

Answer any FOUR questions.                                                                                                         (4 x 10 = 40)

 

23. Discuss any two methods to determine the N-terminal of an amino acid.
24. Explain the types of reversible enzyme inhibition.
25. Explain the series of reactions involved in TCA cycle with the enzymes involved and energy yield.
26. Discuss the biosynthesis of cholesterol.
27. a) Draw and explain the structure of t-RNA.
28. b) Explain the importance of primary structure of proteins.                                                                   (5+5)
29. a) Explain the chemistry of hemoglobin in blood.
30.  b) What is genetic code? Mention any five important characteristics of genetic                           (5+5)

 

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