LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADV. ZOO.& PLA.BIO.&BIOTEC.
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FOURTH SEMESTER – APRIL 2007
CH 4202 – BIO-CHEMISTRY FOR BIOLOGIST
Date & Time: 19/04/2007 / 9:00 – 12:00 Dept. No. Max. : 100 Marks
PART A
Answer all the questions. 10×2=20
- What was the contribution of James B Sumner to biochemistry?
- What is feedback inhibition? Give an example.
- Mention the uses of glycogen.
- Explain isoelectric point.
- Draw the structure of cholesterol.
- What are the differences between DNA and RNA?
- Convert fructose into glucose.
- Define iodine value.
- Draw the structures of camphor and nicotine.
- What are essential fatty acids? Give examples.
PART B
Answer any eight questions. 8×5=40
- How is the structure of fructose elucidated?
- Explain the factors influencing the enzymatic action.
- Describe the importance of macro and micronutrients.
- What are cephalins and plasmalogens? Explain.
- Explain the different types of soil.
- How are alkaloids isolated?
- Explain the replication of DNA.
- What is Line Weaver Burk plot? Mention its significance.
- Explain the classification of terpenes.
- Explain the mechanism of enzymatic action.
- Explain the secondary structure of proteins.
- How is the structure of DNA explained by Watson and Crick model?
PART C
Answer any four questions. 4×10=40
- Draw and explain the structure of t-RNA.
- Describe the importance and uses of anthocyanines, flavones and flavanoids.
- Explain the enzymatic inhibition with examples.
- How is N-terminal of an amino acid determined by Edman and Sanger’s method?
- How is glucose converted to pyruvate? Explain.
- Explain the classification of enzymes with their functions and examples.
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