Biochemistry in Biotechnology MCQs | Page - 1

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Mr. Dubey • 52.41K Points
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Q. The value of ΔG°, if given Kep is 1.7, at 23°C will be

(A) -17.19 kJ mol-1
(B) -19.8 kJ mol-1
(C) +52.82 kJ mol-1
(D) -117.07 kJ mol-1
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Mr. Dubey • 52.41K Points
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Q. Oxidation reduction reactions with positive standard redox potential (ΔE°) have

(A) Positive ΔG°
(B) Negative ΔG°
(C) Positive ΔE+
(D) Negative ΔE+
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Mr. Dubey • 52.41K Points
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Q. The degree of inhibition for an enzyme catalyzed reaction at a particular inhibitor concentration is independent of initial substrate concentration. The inhibition follows

(A) Competitive inhibition
(B) Mixed inhibition
(C) Uncompetitive inhibition
(D) Non-competitive inhibition
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Mr. Dubey • 52.41K Points
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Q. Which one of the following amino acid residues will destabilize an α-helix when inserted in the middle of the helix?

(A) Pro
(B) Val
(C) Ile
(D) Leu
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Mr. Dubey • 52.41K Points
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Q. The turnover numbers for the enzymes E1 and E2 are 150 s-1 and 15 s-1 respectively. This means

(A) E1 binds to its substrate with higher affinity than E2
(B) The velocity of reactions catalyzed by E1 and E2 at their respective saturating substrate concentrations could be equal, if concentration of E2 used is 10 times that of E1
(C) The velocity of E1 catalyzed reaction is always greater than that of E2
(D) The velocity of E1 catalyzed reaction at a particular enzyme concentration and saturating substrate concentration is lower than that of E2 catalyzed reaction under the same conditions
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Mr. Dubey • 52.41K Points
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Q. A protein without its prosthetic group is known as

(A) Apoprotein
(B) Hemoprotein
(C) Holoprotein
(D) lipoprotein
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Mr. Dubey • 52.41K Points
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Q. The active site in the alpha/beta barrel structures is usually located

(A) Inside the barrel
(B) At the amino side of the strands
(C) At the carboxy side of the strands
(D) At any arbitrary site
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Mr. Dubey • 52.41K Points
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Q. Identify the statement that is not applicable to an enzyme catalyzed reaction.

(A) Enzyme catalysis involves propinquity effects
(B) The binding of substrate to the active site causes a strain in the substrate
(C) Enzymes do not accelerate the rate of reverse reaction
(D) Enzyme catalysis involves acid-base chemistry
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Mr. Dubey • 52.41K Points
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Q. Amino acid residue which is most likely to be found in the interior of water-soluble globular proteins is

(A) Threonine
(B) Aspartic acid
(C) Valine
(D) Histidine
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Mr. Dubey • 52.41K Points
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Q. In N-linked glycosylation, the oligosaccharide chain is attached to protein by

(A) Asparagine
(B) Arginine
(C) Serine
(D) Threonine
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