Question

2 An enzyme is

Answer 1

1) An enzyme is denatured when it loses its native conformation and its biological activity. Denaturation of enzyme occurs when they lose the quaternary structure, tertiary structure and secondary structure which is present in their native state, and therby losing their activity.

2) An enzyme considered a catalyst because it speeds up chemical reactions without being used up. They are the biological catalyst that bind to substrate and produce products.

3) An enzyme is considered specific because of its ability to recognize the shape of a particular molecule. Specificity is achieved by binding receptors with complementary shape, charge and polar characteristics to the substrates.

4) A cofactor such as vitamin, binds to an enzyme and plays a role in catalysis. Cofactors serve many purposes; for instance, metal ions can help in stabilizing nucleophilic species within the active site.

5) When properly aligned the enzyme and substrate form an enzyme sustrate complex. The binding is explained by both lock and theory model and induced fit model.

6) A substrate binds to an enzyme at the active site, where the reaction occurs. The catalytic site and binding site together comprise the enzyme's active site.

7) In a catalyzed reaction a reactant is often called a sustrate. substrate is the chemical in a chemical reaction, which is organic in nature and reacts with a reagent to generate a product.