Enzymology : Biology MCQ Practice Questions & Answers (Hindi)

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1.

The coenzyme is:

A

Often a metal

B

always a protein

C

often a vitamin

D

always an inorganic compound

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2.

Who is the father of enzymology?

A

Anton von Leeuwenhoek

B

Edward Howell

C

JB Sumner

D

John Northrop

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3.

Which of these enzymes is related to molecular biology?

A

DNA Ligase

B

DNA topoisomerase

C

Polymerase

D

All the above

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4.

Which of the following statement/s is/are correct?

A

Enzyme is a biocatalyst

B

Enzyme increases the rate of reaction

C

Enzyme decreases the activation energy of the reaction

D

All the above

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5.

Which of the following is the reason for Gout disease?

A

Deficiency of Xanthine Oxidase enzyme

B

Over production of Xanthine Oxidase

C

Deficiency of ß-galactosidase enzyme

D

Deficiency of Lipase enzyme

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6.

Which of the following is correct?

A

Apoenzyme + Cofactor = Holoenzyme

B

Apoenzyme - Cofactor = Holoenzyme

C

Apoenzyme =Cofactor - Holoenzyme

D

None

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7.

Which of the following enzymes is elevated in alcoholism

A

Hepatitis

B

Serum Glutamate Pyruvate Trasmittase

C

Acid Phosphatase

D

glutamyl transpeptidase

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8.

The temperature at which the maximum activity of the enzyme occurs is

A

Optimum temperature

B

Maximum Temperature

C

Minimum Temperature

D

None

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9.

The class of enzymes that catalyzes synthetic reactions where two molecules are joined together and ATP is usedis

A

Hydrolases

B

Lyases

C

Ligases

D

Isomerases

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10.

SI Unit for enzyme activity is

A

Bel

B

mho

C

Hertz

D

Katal

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11.

Pepsin and urease are examples for which class of enzymes

A

Hydrolases

B

Ligases

C

Oxidoreductases

D

Lyases

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12.

Non-protein organic part of the enzyme is

A

Co-factor

B

Co-enzyme

C

Apo enzyme

D

Isoenzyme

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13.

Nature of the enzyme is

A

Protein

B

Lipid

C

Carbohydrate

D

None

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14.

Majority of the enzymes are inactive at

A

At 25oC

B

At 15oC

C

Between 30-40oC

D

Above 70oC

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15.

Induced fit theory for the formation of Enzyme-Substratecomplex was proposed by

A

Koshland

B

Charles Leibeg

C

Buchner

D

Fischer

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16.

Enzymes are classified into.............types

A

Two

B

Three

C

Five

D

Six

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17.

Enzyme that differ in amino acid sequence but catalyze thesame reaction are

A

Co-factors

B

co-enzymes

C

Apo enzymes

D

Isoenzymes

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18.

Deficiency of the enzyme ß-glucerebrosidase results in

A

Gauchers Disease

B

Faber's disease

C

Krabbe's disease

D

Lesh-Nyhan Syndrome

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19.

Competitive inhibitor of an enzyme is

A

Structural analogue of enzyme

B

Functional analogue of enzyme

C

Functional analogue of substrate

D

Structural analogue of substrate

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20.

An enzyme was crystallized for the first time by

A

John Northrop

B

Edward Buchner

C

J. Sumner

D

None

Enzymology in Biology : Practice MCQ Questions & Answers with Explanations