True or false: After one enzyme speeds up a chemical reaction, a cell must make another enzyme to speed up that chemical reaction again.

Classify each phrase as describing an enzyme, an active site, or a substrate. Enzyme may be a phosphate group a protein containing an active site a substance that the enzyme acts upon a biological catalyst Active site Answer Bank Substrate a specific enzyme location that binds with the substrate

Enzymes will   Question 29 options:   lower the free energy of a reaction   raise the activation energy of a reaction   raise the free energy of a reaction   lower the activation energy of a reaction

Item 37 A substance that binds to the active site of an enzyme and turns it off is called a _________ inhibitor. Fill in the blank Item 38 Lactase is an enzyme that digests lactose. True or False Item39     Item 39 Exergonic reactions do not require activation energy. True or False