A Substrate

question 37

Multiple Choice

A substrate

• A)fits into the active site of a specific enzyme.
• B)fits into the active site of another specific substrate.
• C)catalyzes a chemical reaction.
• D)is always a protein.
• E)lowers the energy of activation in a chemical reaction.

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Definitions:

Biscuit

A baked food item, typically flour-based, that varies significantly between regions; in the U.S., it refers to a soft bread roll, while in the U.K. it is akin to what Americans call a cookie.

Extinction

In psychology, the gradual weakening and eventual disappearance of a conditioned response when the conditioned stimulus is repeatedly presented without the unconditioned stimulus.

CR Fading

A technique in classical conditioning by which the conditioned response (CR) is gradually weakened by presenting the conditioned stimulus (CS) without the unconditioned stimulus (US).

Habituation

A decrease in response to a stimulus after repeated presentations, indicating a basic form of learning.