LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

SUPPLEMENTARY SEMESTER EXAMINATION – JUN 2006

B.Sc. DEGREE EXAMINATION

                                             CH 4202 – BIO-CHEMISTRY FOR BIOLOGIST

 

 

 

Date & Time : 28/06/2006/1.00 – 4.00          Dept. No.                                                       Max. : 100 Marks

 

 

PART – A

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

1. What is denaturation of proteins?
2. Define the isoelectric pH of a protein.
3. Differentiate lyases from ligases.
4. Mention any three functions of lipoproteins.
5. Write the structural formulation of a nucleotide. Indicate clearly the nucleoside    portion in it.
6. Draw the open and cyclic structure of D- glucose.
7. Give the net gain of ATP in the glycolysis one mole of glucose to pyruvate.
8. What is Bordeaux mixture? Mention its importance.
9. How is terpene extracted from the flowers?
10. Draw the structure of nicotine? Mention its physiological action.

PART – B

Answer ALL the questions.                                                                           (8 X 5 = 20)

11. Discuss the synthesis of aspartic acid by pthalimidomalonic ester method.
12. Explain Edmand Pehr method of N- terminal analysis of proteins.
13. Illustrate the two models proposed to explain the enzyme action.
14. How are the carbohydrates classified?
15. Write a short note on glycolipids, sphingolipids and plasmolipids.
16. What is inhibition? Explain reversible and irreversible inhibitions?
17. How are super phosphate and triple super phosphate of lime manufactured?
18. Write a short note on the importance of micro and macro nutrients.
19. Illustrate the hydrogen bonding in the G – C and A – T base pairs.
20. What is isoprene rule? Apply it to citral.
21. Write a short note on anthocyanins.
22. Describe the structure, properties and uses of citral and camphor.

 

PART – C

 

Answer any FOUR questions only.                                                             (4X 10 = 40)

23. Explain the structure, properties and functions of fibre and globular proteins.
24. What is glycolysis? Discuss the various steps involved in the glycolysis of glucose to pyruvate.
25. Discuss the salient features of Crick and Watson model for the structure of DNA.
26. What are alkaloids? How are they classified? Explain the structure, physical properties and physiological actions of papaverine.
27. Write a short on the biological importance of lipids.                    (4)
28. What is saponification value of oil? How is it determined? What is its                                  significance?                                                                                                  (6)
29. a. Explain the preparation of amino acids by malonic ester synthesis. (3)
30. Explain the absolute and group specificity of enzyme calalyzed reaction. (4)
31. What is role of humus in the fertility of soil?                    (3)

 

 

 

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