Biomolecules MCQs for NEET — Zoology Questions with Answers

Statement I: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat. Statement II: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.

Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (N-terminal). Statement II: Adult human haemoglobin consists of 4 subunits (two subunits of α type and two subunits of β type).

Match List I with List II:

Choose the correct answer from the options given below:

Regarding catalytic cycle of an enzyme action, select the correct sequential steps:

A. Substrate enzyme complex formation. B. Free enzyme ready to bind with another substrate. C. Release of products. D. Chemical bonds of the substrate broken. E. Substrate binding to active site.

Choose the correct answer from the options given below:

Name the class of enzyme that usually catalyzes the following reaction: $S–G + S^\# \to S + S^\#–G$. Where, $G$ → a group other than hydrogen, $S$ → a substrate, $S^\#$ → another substrate.

Which one of the following enzymes contains 'Haem' as the prosthetic group?

Match List I with List II:

List I — A. Adenosine, B. Adenylic acid, C. Adenine, D. Alanine

List II — I. Nitrogen base, II. Nucleotide, III. Nucleoside, IV. Amino acid

Choose the option with all correct matches:

The protein portion of an enzyme is called:

Why can't insulin be given orally to diabetic patients?