Enzymes

Enzymes increase the energy content of the reactants (or substrates).

False

The amount of energy released by a chemical reaction is much greater when an enzyme catalyzes it.

False

The chemical reactions of living cells could not occur in the absence of enzymes.

False

The higher the temperature, the faster the rate of an enzymatic reaction will be.

False

The rate of an enzymatic reaction depends on the concentration of the substrate but not the concentration of the enzyme.

False

When an enzyme catalyzes a chemical reaction some of the enzyme is lost

False

A substrate molecule binds to certain amino acids that line the active site of an enzyme.

True

Allosteric inhibitors alter the conformation of the enzyme but do not bind at the active site.

True

An enzyme works by decreasing the activation energy of a chemical reaction.

True

Catalysts are neither produced nor consumed by chemical reactions that they catalyze.

True

Chemical reactions release the same amount of energy whether an enzyme is involved or not.

True

Coenzymes alter the shape of the enzyme by binding at a site other than the active site.

True

Enzymes cannot stimulate reactions to occur that would not occur in the absence of the enzyme.

True

Enzymes decrease the activation energy, but have no effect on the energy content of substrates.

True

The active site of the enzyme is the specific region to which the substrate binds.

True

Uncatalyzed reactions have a higher activation energy than catalyzed reactions.

True