Which of the following characteristics are true of enzymes? Check all that apply.

The structure of an enzyme can change if conditions change.

A single enzyme can normally catalyze a wide variety of reactions under many conditions

Enzymes are found only in nonliving systems.

2 Enzymes allow living things to regulate body conditions through feedback mechanisms.

Enzymes bind to specific substrates in specific ways.

Enzymes increase the rate of reaction.

When shown in energy-reaction diagrams, enzymes represent the higher activation energy.