How Is the Pyruvate Dehydrogenase Reaction Regulated

question 33

Multiple Choice

How is the pyruvate dehydrogenase reaction regulated?

• A) pH and enzyme conformation
• B) pH and the protonation state of the active site
• C) allosteric control and covalent modification
• D) product inhibition

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Definitions:

Displacement

In psychology, a defense mechanism where an individual shifts negative feelings from their original source to a more acceptable or less threatening target.

Denial

A defense mechanism where an individual refuses to accept reality or facts, thus avoiding dealing with painful feelings or events.

Sublimation

A defense mechanism in which socially unacceptable impulses or idealizations are transformed into socially acceptable actions or behavior.

Fight-or-flight Response

A physiological reaction to perceived harmful events, attacks, or threats to survival, initiating a state of heightened readiness for physical action.