Exam 20: Enzymes

Inhibition is the irreversible process by which enzymes are rendered nonfunctional.

Zymogen is another term for cofactor.

Cofactors and enzymes form a tightly bound complex without which enzymes will not function.

Which modification of the reaction environment will increase the rate of reaction in which an enzyme participates?

Substrate concentration has what effect on the rate of an enzyme catalyzed reaction?

If a metal ion is required to activate an enzyme,it would be considered a ____.

Enzyme assays are reported in international units (IU).By the definition of an IU,the quantity of enzyme present is measured,not the chemical activity.

The cyanide ion is very toxic to humans because it binds with iron (Fe³⁺)in what enzyme to form a stable complex that stops cellular respiration.

The conditions required for maximum enzyme function are called

Enzymes are proteins that speed up a chemical reaction; inhibitors slow down chemical reactions.

The EC name of an enzyme is alanine transaminase.This indicates that

Ethylene glycol (antifreeze)poisoning can be avoided if methanol is administered shortly after ingesting the ethylene glycol.

How does a zymogen differ from an apoenzyme?

The conversion of a zymogen into an enzyme usually involves another enzyme.

The number of substrate molecules acted upon per minute by one molecule of enzyme is referred to as the

What is the general effect of increasing the substrate concentration in a reaction?

Sulfanilamide prevents bacterial growth because it functions as a competitive inhibitor.

Which of the following disorders results from a deficiency of the enzyme tyroinase?

Which of the following is (are)active enzyme(s)?

A zymogen is correctly classified as a(n)