Explore topic-wise MCQs in Biochemistry.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

The pyruvic acid dehydrogenase complex is reported to

A. decatalyze the oxidation of pyruvic acid to acetyl Co A and CO
B. Catalyze the oxidation of pyruvic acid to acetyl Co A and CO
C. retard the reduction of pyruvic acid to acetyl Co A and CO
D. Catalyze the reduction of pyruvic acid to acetyl Co A and CO
Answer» C. retard the reduction of pyruvic acid to acetyl Co A and CO
Discussion
2.

Tryprotophan synthetase of , 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
Answer» C. a protein A and one-subunit a
Discussion
3.

The proteolysis rate enhancement by chymotrypsin (~10 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
Answer» D. 88 kJ/mol
Discussion
4.

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
Answer» D. A will still be produced, but not B, C, or D
Discussion