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MDCAT Biology Chapter 7 Enzymes Online Test MCQs With Answers

Question # 1

Succinic acid is the ____ of succinic dehydrogenase which undergoes____

Choose an answer

Active site, reduction

Prosthetic group, reduction

Substrate, oxidation

Substrate, reduction

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Question # 2

The optimum temperature for most of the enzymes in human body is

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37 ^oC

35^oC

37 ^oF

98.6^oC

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Question # 3

The competitive inhibitor competes with the

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Enzyme

Cofactor

Substrate

Coenzyme

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Question # 4

Phosphorylation of glucose molecule in glycolysis is carried out by

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ATPase

Kinase

Isomerase

Transferase

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Question # 5

Function of succinic dehydrogenase is aided by

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Metal ion

Vitamin

NAD

FAD

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Question # 6

Following substances can act as inhibitors, except

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Cyanide

Antimetabolites

Antibodies

Poisons

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Question # 7

Enzymes present in human body generally have

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Same optimum temperature and optimum pH

Same optimum temperature but different optimum pH

Same optimum pH but different optimum temperature

Different optimum temperature and optimum pH

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Question # 8

If substrate concentration is unlimited, rate of enzyme action becomes

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Inversely proportional to enzyme concentration

Directly proportional to enzyme concentration

Directly proportional to substrate Concentration

Inversely proportional to substrate

Concentration

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Question # 9

If non protein part is covalently bonded to the protein part of enzyme, it is known as

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Coenzyme

Prosthetic group

Activator

Cofactor

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Question # 10

Succinic acid differs from malonic acid by

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CH₂

CH₃

CHO

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Question # 11

Which one of the following enzymes have slightly acidic pH as optimum pH?

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Sucrase

Enterokinase

Pepsin

Catalase

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