Which of the statements about enzymes are true?
a. nonbiological catalysts and enzymes tend to have a similar degree of reaction specificity.
b. catalysis occurs at the active site, which usually consists of a crevice on the surface of the enzyme.
c. generally, an enzyme is specific for a particular substrate. for example, thrombin catalyzes the hydrolysis of the peptide bond between arg and gly.

b. Catalysis occurs at the active site, which usually consists of a crevice on the surface of the enzyme.

c. Generally, an enzyme is specific for a particular substrate. For example, thrombin catalyzes the hydrolysis of the peptide bond between Arg and Gly.

Explanation:

The role of the enzyme is to produce a specific product, whereas the non-biological catalyst produces more than one product. Thus they have a different degree of reaction specificity.

The active site of the enzyme is the catalytic site of the enzyme. It is the region where the substrate molecule bind and undergoes a chemical reaction. The enzyme exhibit a special crevice or opening at the active site which facilitates the binding with the substrate.

Enzymes usually bind to a specific substrate as they have an active site that allows a particular substrate to bind to the active site of the enzyme. This is because of the shape of the active site of the enzyme which has a binding affinity with a particular substrate any other substrate cannot bind to the active site.

explanation:

detials on each model with digrams