LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – CHEMISTRY
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FIFTH SEMESTER – APRIL 2008
CH 5401 – BIO CHEMISTRY
Date : 06/05/2008 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
PART A
Answer all the questions 10 x 2 = 20
- What are the functions of nucleus?
- What is Zwitter ion?
- What are ligases? Give an example.
- Draw the structure of cholesterol.
- What are the products obtained by the oxidation of fructose?
- What are the differences between cellulose and starch?
- Write a note on biological oxidation?
- What is the role of ubiquinone in electron transport mechanism?
- What are purine and pyrimidine bases?
- Write down the various types of RNA.
PART B
Answer any eight questions 8 x 5 = 40
- Explain the primary structure of proteins.
- How is N-terminal of an amino acid determined by Sanger’s method?
- How is alanyl glycine prepared?
- Explain the factors affecting the enzyme activity.
- Discuss β-Oxidation of fatty acids.
- Discuss any three important phospholipids.
- Explain the cyclic structure of D-glucose.
- Explain the classification of carbohydrates with examples.
- Discuss the mechanism of oxidative phosphorylation.
- Draw the structure of hemoglobin. Write any two the functions of hemoglobin.
- Explain the clover leaf model of t-RNA.
22 Discuss the replication of DNA.
PART C
Answer any four questions 4 x 10 = 40
- a) Explain the secondary structure of proteins.
- b) Describe any two methods of preparation of amino acids.
- a) Explain the steps involved in absorption and digestion of proteins.
- b) What are the differences between animal and plant fats?
- Describe different types of enzyme inhibition.
- Explain the overall process of glycolysis with enzymes involved in each step and energy yield.
- Explain the role of RNA involved in protein biosynthesis.
- Explain the double helical structure of DNA.
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