LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
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B.Sc. DEGREE EXAMINATION – PLANT.BIO&BIOTEC.& ADV.ZOO.&BIO.TECH.
FOURTH SEMESTER – April 2009
CH 4204 / CH 4202 – CHEMISTRY FOR BIOLOGISTS – II
Date & Time: 27/04/2009 / 9:00 – 12:00 Dept. No. Max. : 100 Marks
PART A
Answer all the questions. 10 x 2 = 20
- Who is called as the father of modern enzymology? Why?
- Define isoelectric point.
- How is glycine prepared by strecker synthesis?
- What are coenzymes?
- Define rancidity of an oil.
- Draw the structure of adenine and guanine.
- How is the presence of ketone group in C-2 position confirmed in fructose?
- Draw the structures of a) papavarine and b) camphor.
- Define saponification value of an oil.
- How is urea prepared?
PART B
Answer any eight questions. 8 x 5 = 40
- How is N-terminal of an amino acid determined by Sanger’s method?
- What are the factors affecting the enzymatic activity?
- What are phospholipids? Explain any two types of phospholipids.
- Describe the steps involved in the preparatory phase of glycolysis.
- What are macro and micronutrients? Discuss with examples.
- Explain the classification of alkaloids.
- How are the following prepared?
- a) Superphosphate of lime b) DDT c) BHC
- Distinguish glucose and fructose by oxidation and reduction reactions.
- Explain the isolation of terpenes.
- Discuss the different types of soil.
- Describe the importance of flavones and flavanoids.
- Give any two methods of preparation of an amino acid.
PART C
Answer any four questions. 4 x 10 = 40
- What is enzyme inhibition? Explain the types of inhibition with examples.
- a) Explain the double helical structure of DNA.
- b) Briefly describe the replication of DNA. (5+5)
- Discuss the various steps involved in TCA cycle with the energy yield.
- How is the structure of glucose elucidated?
- a) What are coenzymes? Explain the mechanism of coenzyme reaction.
- b) What is translation? Explain the process in brief. (5+5)
- Explain the primary and secondary structure of proteins.
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