MCQS AIIMS MD/MS PGEE 2004 NOVEMEBER BIOCHEMISTRY AIIMSPGEE AIIMSPGMEE ALL INDIA INSTITUTE OF MEDICAL SCIENCES NEW DELHI MULTIPLE CHOICE QUESTIONS PLAB, IELTS, USMLE, GRE, AIPGMEE, AIIMS, AFMC, BHU, CMC, JIPMER, PGI, SGPGI, ...

AIIMS 2004 NOVEMBER BIOCHEMISTRY MCQS

Question 1: Which one of the following amino acids is most likely to be found in the transmembrane region of a protein ?

A) Lysine

B) Arginine

C) Leucine

D) Aspartate

Answer: C

Question 2: The molecular weight of a protein can be determined by ?

A) Native Poly Acrylamide Gel Electrophoresis (PAGE)

B) Sodium Dodecyl Sulphate h-PAGE

C) Isoelectric focusing

D) Ion Exchange Chromatography

Answer: B

Question 3: Which one of the following statements about Hemoglobin S (HbS) is not true ?

A) Hemoglobin HbS differs from hemoglobin HbA by the substitution of Val for Glu in position 6 of the beta chain

B) One altered peptide of Hb S migrates faster towards the cathode (-) than the corresponding peptide of HbA

C) Binding of HbS to the deoxygenated HbA can extend the polymer and cause sickling of the red blood cells

D) Lowering the concentration of deoxygenated Hb S can prevent sickling

Answer: C

Question 4: Which one of the following acts to increase the release of Ca²⁺ from endoplasmic reticulum ?

A) Inositol triphosphate

B) Parathyroid hormone

C) 1,25-dihydroxy cholecalciferol

D) Diacyglycerol

Answer: A

Question 5: Ladder pattern of DNA electrophoresis in apoptosis is caused by the action of the following enzyme ?

A) Endonuclease

B) Transglutaminase

C) DNAse

D) Caspase

Answer: A

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