Chapter 3 - Enzymes

Enzymes

biological catalysts that speed up the rate of chemical reactions without being altered in the reaction.

Substrate

________ and enzyme molecules have little kinetic energy, hence the frequency of collision is low.

activation energy

To work at their best, enzymes lower this

unchanged

The state of enzymes after they have catalyzed a reaction

lock and key hypotheses

The theory that relates enzyme specificity to the presence of active sites.

denatured

The state of enzymes after being provided with too much heat

inactive

The state of enzymes at lower temperatures

Active site

the region on an enzyme molecule that the substrate binds to.

Optimum pH

The pH at which enzymes work at their best