Question

Active site of an enzyme is formed of

• A. Amino groups of some amino acids
• B. Carboxyl groups of some amino acids
• C. $-HS$ bonds of amino acids
• D. $R$-groups of selected amino acids

Answer 1

The correct option is A Amino groups of some amino acids

Part of an enzyme where substrate molecules get attached is known as an active site. On attachment to the active site, the substrate is changed into the product. The active site has a residue which helps in the attachment of substrate. The substrate molecules form a temporary bond with the enzyme at the active site. Bonds like hydrogen bonds, hydrophobic interactions, or temporary non-covalent interactions are formed which leads to the formation of an enzyme-substrate complex. The active site is made up of R group which provides variability to the active site and allows easy attachment.

So, the correct answer is option D.