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.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Enzymes, Carbohydrates and Gycobiology. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Enzymes, Carbohydrates and Gycobiology knowledge to the test? Let's get started with our carefully curated MCQs!

Enzymes, Carbohydrates and Gycobiology MCQs | Page 15 of 20

Discover more Topics under Biochemistry

Q141.
Which of the following is false about lysozyme?

a.

It is an antibacterial agent found in tears and egg white

b.

The substrate of lysozyme is peptidoglycan

c.

Lysozyme cleaves (ฮฒ1 โ†’ 4) glycosidic C-O bonds between two types of sugar residue in the molecule NAM and NAG

d.

It is a bisubstrate enzyme

Discuss
Answer: (d).It is a bisubstrate enzyme
Q142.
The allosteric inhibitor of an enzyme ___________

a.

Causes the enzyme to work faster

b.

Binds to the active site

c.

Participates in feedback regulation

d.

Denatures the enzyme

Discuss
Answer: (c).Participates in feedback regulation
Q143.
Which of the following is false about allosteric feedback inhibition?

a.

Bacterial enzyme system is the first known example

b.

Conversion of L-leucine to L-isoleucine

c.

Threonine dehydratase is inhibited by isoleucine

d.

If the isoleucine concentration decreases, the rate of threonine dehydration increases

Discuss
Answer: (b).Conversion of L-leucine to L-isoleucine
Q144.
Which of the following is false?

a.

Methyl, phosphoryl, adenyl, uridylyl and adenosine diphosphate ribosyl groups are the modifying groups

b.

An example of an enzyme regulated by methylation is the methyl-donating chemo taxis protein of bacteria

c.

The protein is a part of the system that permits a bacterium to swim towards attractant

d.

The methylating agent is S- adenosylmethionine

Discuss
Answer: (b).An example of an enzyme regulated by methylation is the methyl-donating chemo taxis protein of bacteria
Q145.
Which of the following enzyme is responsible for the regulation of biological nitrogen fixation?

a.

Dinitrogenase reductase

b.

Dinitrogenase oxidase

c.

Phosphatase

d.

Kinase

Discuss
Answer: (a).Dinitrogenase reductase
Q146.
Which of the following enzymes catalyze the ADP-ribosylation of key cellular enzymes or proteins?

a.

Diphteria toxin and cholera toxin

b.

Dinitrogenase reductase

c.

Protein phosphatases

d.

Kinase

Discuss
Answer: (a).Diphteria toxin and cholera toxin
Q147.
Removal of phosphoryl groups is catalyzed by ___________

a.

Diphteria toxin and cholera toxin

b.

Dinitrogenase reductase

c.

Protein phosphatases

d.

Protein kinases

Discuss
Answer: (c).Protein phosphatases
Q148.
The attachment of phosphoryl groups to specific amino acid residues is catalyzed by ___________

a.

Diphteria toxin and cholera toxin

b.

Dinitrogenase reductase

c.

Protein phosphatases

d.

Protein kinases

Discuss
Answer: (d).Protein kinases
Q149.
Which of the following is false about the following reaction?

Phosphorylase a + 2Hโ‚‚O โ†’ phosphorylase b + 2Pแตข

a.

Phosphorylase a is less active and phosphorylase b is more active

b.

Glycogen phosphorylase catalyzes this reaction

c.

Phosphorylase b can be transformed back into phosphorylase a by phosphorylase kinase

d.

Phosphorylase kinase catalyzes the transfer of phosphoryl groups from ATP to Phosphorylase b

Discuss
Answer: (a).Phosphorylase a is less active and phosphorylase b is more active
Q150.
Which of the following takes place due to phosphorylation of isocitrate dehydrogenase?

a.

Inhibits the binding of citrate at active site

b.

Degrades the enzyme

c.

Enhances the substrate-binding affinity

d.

No reaction

Discuss
Answer: (a).Inhibits the binding of citrate at active site
Page 15 of 20