Enzymes

An organism can live without enzymes.

False

Enzymes:

are produced at the direction and translation of DNA and RNA respectively

A substance which accelerates any chemical reaction but is not consumed by the reaction is called a

catalyst

Often enzymes require a ________ in order for them to function as a catalyst

cofactor

A compound which is involved in a chemical reaction and is chemically changed by the reaction.

substrate

An enzyme may react with several substrate chemicals simultaneously.

true

In the figure illustrating the typical enzyme reaction, which is a substrate reactant?

A or B

The region on the surface of an enzyme molecule where the substrate molecule binds and reacts with the enzyme.

active site

An enzyme is:

biological catalyst

An inorganic metal or small organic molecule which attaches to the protein portion of the enzyme and plays an important role in activating that enzyme.

cofactor

An enzyme is a large _____ molecule.

protein

The substance on which the enzyme acts is called the chemical.

substrate

If the reactants found in a cell are removed from the cell how will they behave chemically?

they may not be able to react

Why are enzymes necessary?

to act as a catalyst in chemical reactions.

Numerous different enzymes are produced by the cells.

true

(Select all that apply.) Choose enzyme cofactors mentioned in the lesson.

vitamins iron copper cobalt zinc calcium