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Proteins
(Single Best Answer) Question 1: The amino acid residue having an imino side chain is ?
A) Histidine
B) Lysine
C) Proline
D) Tyrosine
Answer (Select an option above to get the answer):
(Single Best Answer) Question 2: Enzymes that move a molecular group from one molecule to another are known as ?
A) Dipeptidases
B) Ligases
C) Oxidoreductases
D) Transferases
Answer (Select an option above to get the answer):
(Single Best Answer) Question 3: The 3 dimensional shape of a protein is maintained by ?
A) Strong covalent interactions
B) Interactions with other proteins
C) Multiple weak interactions
D) Interactions with prosthetic groups
Answer (Select an option above to get the answer):
(Single Best Answer) Question 4: 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 (Select an option above to get the answer):
(Single Best Answer) Question 5: 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 (Select an option above to get the answer):
(Single Best Answer) Question 6: 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 (Select an option above to get the answer):
(Single Best Answer) Question 7: Strongest bond among the following is ?
A) Electrostatic bond
B) Hydrogen bond
C) Hydrophobic bond
D) Vanderwall's forces
Answer (Select an option above to get the answer):
(Single Best Answer) Question 8: Leucine is an amino acid with ?
A) Polar side chain
B) Non-polar side chain
C) Negatively charged side chain
D) Positively charged side chain
Answer (Select an option above to get the answer):
(Single Best Answer) Question 9: Which of the following is most commonly used to detect the tertiary structure of the proteins ?
A) Chromatography
B) Electrophoresis
C) Spectrophotometry
D) X-ray crystallography
Answer (Select an option above to get the answer):
(Single Best Answer) Question 10: Structural proteins are ?
A) Branched
B) Compound
C) Fibrous
D) Globular
Answer (Select an option above to get the answer):
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