LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – CHEMISTRY
|
FIFTH SEMESTER – April 2009
CH 5404 / CH 5401 – BIO CHEMISTRY
Date & Time: 30/04/2009 / 1:00 – 4:00 Dept. No. Max. : 100 Marks
PART A
Answer all the questions. 10 x 2 = 20
- Give any two functions of the nucleus.
- How is glycine prepared by Strecker synthesis?
- Define catabolism.
- How is C-terminal of an amino acid determined?
- What are coenzymes?
- Define iodine number of an oil.
- What will happen when glucose and fructose are oxidized by conc. HNO3?
- Draw the structure of purine and pyrimidine bases in DNA.
- Define oxidative phosphorylation.
- Mention any two differences between amylose and amylopectin.
PART B
Answer any eight questions. 8 x 5 = 40
- How is N-terminal of an amino acid determined by Sanger’s method?
- Describe the synthesis of glycyl alanine by t-BOC method?
- Explain the biosynthesis of fatty acids.
- Discuss the b-oxidation theory of fatty acids.
- Mention differences between prokaryotic and eukaryotic cells.
- What are phosopholipids? How are they classified? Explain.
- Discuss the mechanism of electron transport reaction.
- Draw and explain the structure of t-RNA.
- Briefly explain the replication of DNA.
- What is genetic code? Mention any four important characteristics of the genetic code?
- Describe the role of hemoglobin in the chemistry of respiration.
- What are the factors affecting the enzymatic activity?
PART C
Answer any four questions. 4 x 10 = 40
- What are the different chemical bonds involved in protein structure? Explain.
- Define enzyme inhibition. Explain the types of inhibition with examples.
- a) Define biological oxidation. Give any five salient features of biological oxidation.
- b) Mention any five differences between plant and animal fats. (5+5)
- How is glucose converted to pyruvate? Explain.
- Draw and explain the citric acid cycle with all the steps involved.
- Discuss the biosynthesis of proteins in brief.
Latest Govt Job & Exam Updates: