Enzymes MCQs Test with Answers

Important Enzymes MCQs test with answers curated for biology students and MDCAT test preparation online.

Enzymes MCQs Test with Answers

Enzymes MCQs Quiz

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1. The nature of an enzyme is :

A. Lipid

B. Vitamin

C. Carbohydrate

D. Protein

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2. In alcoholism, this enzyme is elevated :

A. acid phosphatase

B. hepatitis

C. serum glutamate pyruvate transaminase

D. Glutamyl transpeptidase

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3. 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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4. This enzyme was first isolated and purified in the form of crystals :

A. Urease

B. pepsin

C. Amylase

D. Ribonuclease

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5. Macromolecule chitin is :

A. a simple polysaccharide

B. sulphur containing polysaccharide

C. phosphorous containing polysaccharide

D. nitrogen containing polysaccharide

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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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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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8. A _____ is a biocatalyst that increases the rate of the reaction without being changed.

A. Aluminum oxide

B. Silicon dioxide

C. Enzyme

D. Hydrogen peroxide

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9. What is the nature of an enzyme?

A. Vitamin

B. Lipid

C. Carbohydrate

D. Protein

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10. What is an apoenzyme?

A. It is a protein portion of an enzyme

B. It is a non-protein group

C. It is a complete, biologically active conjugated enzyme

D. It is a prosthetic group

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11. Name the coenzyme of riboflavin (B2)?

A. NAD or NADP

B. FAD and FMN

C. Coenzyme A

D. Thiamine pyrophosphate

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12. Which of this vitamin is associated with the coenzyme Biocytin?

A. Nicotinic acid

B. Thiamine

C. Biotin

D. Pyridoxine

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13. Name the enzyme secreted by pancreas?

A. Pepsin

B. Chymotrypsin

C. Trypsin

D. Alcohol dehydrogenase

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14. Name the enzyme which catalyzes the oxidation-reduction reaction?

A. Transaminase

B. Glutamine synthetase

C. Phosphofructokinase

D. Oxidoreductase

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15. What is the function of phosphorylase?

A. Transfer inorganic phosphate

B. Transfer a carboxylate group

C. Use H2O2 as the electron acceptor

D. Transfer amino group

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16. Mark the CORRECT function of enzyme, Peptidase?

A. Cleave phosphodiester bond

B. Cleave amino bonds

C. Remove phosphate from a substrate

D. Removal of H2O

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17. Which of the following reaction is catalyzed by Lyase?

A. Breaking of bonds

B. Formation of bonds

C. Intramolecular rearrangement of bonds

D. Transfer of group from one molecule to another

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This quiz is designed to test your understanding of enzymes, their functions, mechanisms, and significance in biological processes.

IMPORTANT INSTRUCTIONS

Follow these instructions to get started:

The quiz consists of multiple-choice questions (MCQs). Each question will have four answer options. Choose the correct answer for each question.
You have 20 minutes to complete the quiz. Manage your time wisely!
Each correct answer will count as one point. There is no negative marking, so make sure to answer every question.
After completing the quiz, you will receive immediate feedback on your performance, along with correct answer for each question.

This quiz aims to reinforce your learning about enzymes and prepare you for academic exams and real-world applications in fields like biochemistry, medicine, and biotechnology.

IMPORTANT: Read MDCAT Past Papers for medical and dental colleges admission test preparation online.

​Enzymes MCQs Test with Answers

IMPORTANT INSTRUCTIONS