Enzymes, Carbohydrates and Gycobiology MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Enzymes, Carbohydrates and Gycobiology, a fundamental topic in the field of Biochemistry. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Enzymes, Carbohydrates and Gycobiology MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Enzymes, Carbohydrates and Gycobiology mcq questions that explore various aspects of Enzymes, Carbohydrates and Gycobiology problems. Each MCQ is crafted to challenge your understanding of Enzymes, Carbohydrates and Gycobiology principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemistry tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Enzymes, Carbohydrates and Gycobiology MCQs are your pathway to success in mastering this essential Biochemistry topic.

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Enzymes, Carbohydrates and Gycobiology MCQs | Page 6 of 20

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Q51.
Enzyme-driven metabolic pathways can be made more efficient by

a.

concentrating enzymes within specific cellular compartments

b.

grouping enzymes into free-floating, multienzyme complexes

c.

fixing enzymes into membranes so that they are adjacent to each other

d.

All of the above

Discuss
Answer: (d).All of the above
Q52.
Which of the following (s) is/are serine proteases?

a.

Chymotrypsin

b.

Trypsin

c.

Elastase

d.

all of these

Discuss
Answer: (d).all of these
Q53.
Which of the following statements about enzymes or their function is true?

a.

Enzymes do not alter the overall change in free energy for a reaction

b.

Enzymes are proteins whose three-dimensional form is key to their function

c.

Enzymes speed up reactions by lowering activation energy

d.

All of the above

Discuss
Answer: (d).All of the above
Q54.
Tryprotophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consist of

a.

a protein designated A

b.

two proteins designated A and B

c.

a protein A and one-subunit a

d.

a protein designated B

Discuss
Answer: (b).two proteins designated A and B
Q55.
What is the specificity of the Clostripain protease?

a.

It cleave after Arg residues

b.

It cleave after His residues

c.

It cleave after Lys residues

d.

None of the above

Discuss
Answer: (a).It cleave after Arg residues
Q56.
How is the enzyme COX-1 important in human health?

a.

It helps to transport carbon dioxide in the blood

b.

It is critical for the biosynthesis of DNA

c.

It is a chemical derivative of aspirin

d.

It catalyzes the production of hormones that maintain the stomach lining

Discuss
Answer: (d).It catalyzes the production of hormones that maintain the stomach lining
Q57.
The proteolysis rate enhancement by chymotrypsin (~10¹⁰ folds) corresponds to a reduction in activation energy of about

a.

40 kJ/mol

b.

49 kJ/mol

c.

58 kJ/mol

d.

88 kJ/mol

Discuss
Answer: (c).58 kJ/mol
Q58.
Which of the following is false statement with regard to comparison between Serine and HIV proteases?

a.

Both use nucleophilic attack to hydrolyze the peptide bond

b.

Both require water to complete the catalytic cycle

c.

Both forms an acyl-enzyme intermediate

d.

Both show specificity for certain amino acid sequences

Discuss
Answer: (c).Both forms an acyl-enzyme intermediate
Q59.
In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2?

A ---(E1)---> B ---(E2)---> C ---(E3)--->

a.

A, B, C, and D will all still be produced

b.

A, B, and C will still be produced, but not D

c.

A and B will still be produced, but not C or D

d.

A will still be produced, but not B, C, or D

Discuss
Answer: (c).A and B will still be produced, but not C or D
Q60.
The nucleophile in serine proteases is

a.

Serine

b.

water

c.

both (a) and (b)

d.

Asparagine

Discuss
Answer: (c).both (a) and (b)
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