Enzymes - Mock Test 1

Question 1

The nature of an enzyme is

A) Lipid B) Vitamin C) Carbohydrate D) Protein

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Question 2

In alcoholism, this enzyme is elevated

A) acid phosphatase B) hepatitis C) serum glutamate pyruvate trasmittase D) glutamyl transpeptidase

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Question 3

With regards to enzyme action, this statement is incorrect

A) Malonate is a competitive inhibitor of succinic dehydrogenase B) substrate binds with enzyme as its active site C) non competitive inhibitor binds the enzyme at a site distinct from that binding the substrate D) addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate

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Question 4

What is the count of genes that determine the synthesis of one enzyme

A) One B) Four C) Eight D) Sixteen

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Question 5

This enzyme was first isolated and purified in the form of crystals

A) Urease B) Pepsin C) Amylase D) Ribonuclease

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Question 6

Enzyme-driven metabolic pathways can be made more efficient by

A) grouping enzymes into multienzyme free-floating complexes B) concentrating enzymes with specific cellular compartments C) fixing enzymes into membranes so they are adjacent to each other D) all of these

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Question 7

Tryptophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consists of

A) a protein A and one subunit A B) a protein designated A C) two proteins designated A and B D) a protein designated B

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Question 8

This statement about enzymes is true

A) enzymes accelerate reactions by lowering activation energy B) enzymes are proteins Whose three-dimensional form is key to their function C) enzymes do not alter the overall change in free energy for a reaction D) all of these

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Question 9

The enzyme COX-1 is Vital for human health in this way

A) it is a chemical derivative of aspirin B) catalyzes the hormone-production which maintains the stomach lining C) critical for the biosynthesis of DNA D) helps in the transportation of carbon dioxide in the blood

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Question 10

The active site of an enzyme comprises of

A) Large volume B) Small volume C) Most of the enzyme volume D) Most of the cofactor

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