Sunday, April 26, 2009

35 - AIIMS MAY 2001 biochemistry mcqs with answers

1q) Vitamin K is needed for the post translational
modification of

a) Carboxylation
b) Methylation
c) Hydroxylation
d) Transketolation

2q) Amber codon refers to

a) Initiating codon
b) Mutant codon
c) Stop codon
d) Codon coding for multiple amino acids

3q) At physiological pH, the most stable amino
acid is

a) Histidine
b) Lysine
c) Arginine
d) Leucine

4q) In cystinuria, amino acids excreted are all the
following except:

a) Ornithine
b) Arginine
c) Lysine
d) Histidine

5q) Dietary triglycerides are transported by

a) Chylomicrons
b) LDL
d) HDL

6q) In which of the following reaction, thiamine
is not used

a) Alpha ketoglutarate to succinyl CoA
b) Glucose to pentose
c) Oxidative decarboxylation of Alpha keto amino acids
d) Lactate to pyruvate

7q) In chromatography, mass movement of the
substances is seen in

a) Electrophoresis
b) Diffusion
c) Osmosis
d) Paper chromatography

8q) The type of chromatography in which
proteins are bound to another substance is

a) Hydrophobic chromatography
b) Affinity chromatography
c) paper chromatography
d) gel chromatography

9q) The end-product of citric acid cycle used in
detoxification of ammonia in brain is

a) Oxaloacetate
b) Alpha keto glutarate
c) Succinate
d) Citrate

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