Question

The binding site of substrate on enzyme is known as

• A. Binding site
• B. Reaction center
• C. Allosteric site
• D. Lock-and-key model
• E. Active site

Answer 1

The correct option is E Active site

The active site of an enzyme is the point of attachment of substrate to form a enzyme substrate complex. Since enzymes are proteins, this site is composed of a unique combination of amino acid residues (side chains or R groups). Each amino acid residue can be large or small; weakly acidic or basic; hydrophilic or hydrophobic; and positively-charged, negatively-charged, or neutral. The positions, sequences, structures, and properties of these residues create a very specific chemical environment within the active site. A specific chemical substrate matches this site like a jigsaw puzzle piece and makes the enzyme specific to its substrate.