1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Which of the following biomolecules does have a phosphodiester bond?
A
Amino acids in a polypeptide
B
Nucleic acids in a nucleotide
C
Fatty acids in a diglyceride
D
Monosaccharides in a polysaccharide
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
The chitinous exoskeleton of arthropods is formed by the polymerisation of
A
N - acetyl glucosamine
B
lipoglycans
C
keratin sulphate and chondrotin sulphate
D
D - glucosamine.
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Which one of the following statements is incorrect?
A
The compettive inhibitor does not affect the rate of breakdown of the enzyme -substrate complex.
B
The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate
C
A competitive inhibitor reacts reversibly with the enzyme to form and enzyme-inhibitor complex.
D
In competitive inhibition, the inhibitor molecules is not chemically changed by the enzyme.
4
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Select the option which is not correct with respect to enzyme action.
A
Substrate binds with enzyme at its active site.
B
Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate.
C
A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate.
D
Malonate is a competitive inhibitor of succinic dehydrogenase.
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