LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – BIO TECHNOLOGY
FIRST SEMESTER – APRIL 2007
IB 21
BT 1814 - BIOMOLECULES
Date & Time: 27/04/2007 / 1:00 - 4:00
Dept. No.
Max. : 100 Marks
PART-A
Answer all the questions.
I. Choose the correct answer.
(20 MARKS)
(5 X 1=5)
1.Prosthetic group in glycoprotein is
a) lipid
b)carbohydrate
c)metal
d)phosphate
2.At about 0° C most enzymes are
a) active
b)inactive
c) destroyed
d) replicated.
3.Which of the following is not reducing sugar?
a)glucose b)fructose
c)sucrose
d) maltose.
4.One of the following is a nonprotein amino acid
a)citrulline b)ornithine
c)alanine
d)all of them.
5.All glycerol containing lipids are synthesised from
a) lecithin b)triglyceride
c)monoglyceride
d)phosphatidic acid
II Say True or False if False, state reason
(5x1=5)
6. Oleic acid can be synthesised from stearic acid.
7. Ribonucleotide reductase requires the cofactor thioredoxin.
8. The coenzyme NAD is not involved in hydrogen transfer.
9. Zwitter ionic form of an aminoacid carries charge.
10. Maltose is a disaccharide containing glucose and galactose.
III Complete the following
(5x1=5)
11. Substances which can prevent oxidative rancidity are known as______________
12. An enzyme which joins DNA molecule is called _____________________
13. Reversible denaturation is called as ____________________
14. The α and β cyclic forms of D-Glucose are referred to as________________
15. __________________ catalyses the conversion of adenine to AMP.
IV Answer the following, each within 50 words
(5X1=5)
16. Saponification number
17. Salting in
18. Isoenzymes
19. Structure of co A
20. Structure of hyaluronic acid
PART – B
Answer any 5 questions each with in 350 words only (5X8=40)
21.What are enzymes? Describe their classification.
22.Write an account on properties of monosaccharides.
23.Describe the denaturation of proteins.
24.Explain primary structure of proteins.
25.Enumerate the steps involved in the biosynthesis of triacylglycerol and lecithin.
26.Explain a) salvage pathway of purines b) allosteric inhibition.
27.Derive Michaelis –Menten equation.
28.Draw the stucture of a) cholesterol
b) plasmalogen
c) heparin
PART-C
d) uracil.
(2X20=40)
Answer each of the following, within 1500 words
29
a) Describe the classification of lipids .Give an account on properties of fat.
(OR)
b) Explain the classification of carbohydrates. Describe the structure of cellulose
and glycogen.
30 a)
b)
Describe the structural organization of protein and mention the forces responsible
for stabilization
(OR)
Explain anabolism and catabolism of pyrimidine nucleotides and add a note on
regulation.
______________