Enzymes are proteins. Enzymes are in general globular proteins.
Like all proteins, enzymes are long, linear chains of amino acids that fold to produce a three-dimensional product.
Most enzymes can be denatured-that is, unfolded and inactivatedby heating or chemical denaturants, which disrupt the three dimensional structure of the protein.
Depending on the enzyme, denaturation may be reversible or irreversible.
Option C is correct.