AP BIOLOGY

Detailed explanation-1: -Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is released, unchanged, and can be used for another reaction. This means that for each reaction, there does not need to be a 1:1 ratio between enzyme and substrate molecules.

Detailed explanation-2: -Once a new product leaves an enzyme, the enzyme is unchanged and ready for the next substrate. What is this called? reusable. What is a substance called if it speeds up a chemical reaction? catalyst.

Detailed explanation-3: -Why do we say that “an enzyme is reusable"? The products of the reaction are released from the active sites of the enzyme, allowing other substrate molecules to bind with the sites.

Detailed explanation-4: -Specificity is a property of the enzyme and describes how restrictive the enzyme is in its choice of substrate; a completely specific enzyme would have only one substrate.

Detailed explanation-5: -The induced fit model states an substrate binds to an active site and both change shape slightly, creating an ideal fit for catalysis. When an enzyme binds its substrate it forms an enzyme-substrate complex.