Andhra University 2007 B.Sc Chemistry PRINCIPLES OF BIO - Question Paper

[ BS - 115 ]
PART II - BIOCHEMISTRY
(Common Core Scheme)
Paper I - PRINCIPLES OF BIOCHEMISTRY

Time : 3 hours
Maximum : 100 marks

part A - (12 marks)
ans ALL ques..

1. Write the chemical structures of the subsequent :
(a) Tryptophan
(b) AMP
(c) Repeating unit of chondroitin sulphate A
(d) Lecithin
(e) Protoporphyrin
(f) Cholesterol

part B - (8 x five = 40 marks )

2. Write briefly on any 8 of the subsequent :
(a) Classification of amino acids
(b) Principle in estimation of RNA
(c) Formation of osazones by carbohydrates
(d) Gangliosides
(e) Chlorophyll
(f) Principle and applications of affinity chromatography
(g) Beer - lamberdt's legal regulations
(h) Detection of amino terminus of polypeptide.
(i) Determination of molecular weight of protins by Molecular sieving.
(j) Biuret reaction.

part C - ( three x 16 = 28 marks )
ans any 3 of the subsequent.

3. explain the various levels of structural organisation of proteins.
4. define an experiment to show that DNA is a genetic material.
5. Critically examine the structure of Starch and Glycogen.
6. How are the lipids classified ? Write the important properties of lipids.
7. define PAGE and its applications.
8. explain the various methods used for the purification of proteins.

Earning:   Approval pending.