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CHE-09
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2016
00147
CHEMISTRY
CHE-09 : BIOCHEMISTRY
Maximum Marks : 50
Time : 2 hours
Note : Answer any five questions. All questions carry
equal marks.
1.
(a) Fill in the blanks in the following :
(i)
3
Fatty acid oxidation takes place in
(ii) Glycolysis of each glucose residue of
glycogen leads to a net generation of
molecules of ATP.
is
major
the
(iii)
immunoglobulin in normal human
serum.
(b) Give any four differences between
prokaryotes and eukaryotes.
4
(c) What are isoenzymes ? Explain giving one
example.
3
CHE-09
1
P.T.O.
2.
(a) Write one scientific contribution of any
four of the following :
(i)
Hershey and Chase
(ii)
Northrop and Kunitz
(iii)
S.J. Singer and G.L. Nicolson
(iv)
Melvin Kelvin
(v)
Watson and Crick
(b) Give one difference (structure and function)
between any three of the following :
3.
(i)
Glycogen and Cellulose
(ii)
Lipoprotein and Prostaglandin
(iii)
a-helix and [3-pleated sheet
(iv)
Deoxyribonucleic acid and Ribonucleic
acid
(a) 'What is metastasis ? Why is it life
threatening ?
(b)
(c)
(d)
CHE-09
4
6
2
Why is ATP called the energy currency of a
living cell ?
3
What are the forces stabilising the tertiary
structure of proteins ?
2
How is pyruvate metabolised under different
physiological conditions ?
3
2
4.
(a) Name the coenzyme form of vitamin B5.
Write the structure of this coenzyme.
What is genetic code ? Give any three salient
features of the genetic code.
4
Explain the mode of action of streptomycin
and puromycin.
3
(a) Write the structures of any four of the
following :
4
(b)
(c)
5.
(b)
(c)
6.
3
(i)
Adenosine
(ii)
Sucrose
(iii)
Glutamine
(iv)
Phosphatidylcholine
(v)
Nicotinic acid
(vi)
Acetyl CoA
Name any four factors that modify the
immune response and describe in brief any
one of these.
4
Define melting point of DNA. What are the
factors affecting it ?
2
(a) Humans can convert glucose into fatty acids
but cannot convert fatty acids into glucose.
Explain why. 3
(b)
(c)
CHE-09
What is substrate level phosphorylation ?
Give an example.
3
Give the names of any two fat soluble and
water soluble vitamins and one disease each
caused by their deficiency.
4
3
P.T.O.
7.
(a) Explain the term enzyme immobilization.
Write any one method used for
immobilization of enzymes.
(b)
Describe the similarities between DNA
replication and RNA transcription.
(c)
4
3
Write the role of thylakoid membrane and
stroma in the photosynthetic process. What
are the products formed in the light
reactions of photosynthesis ?
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