Enzyme Structure

AP Biology· difficulty 2/5

A non-protein helper required by some enzymes for activity is called a

A
$Allosteric regulator (binds elsewhere)$
B
$Cofactor (or coenzyme if organic)$
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C
$Substrate (binds active site)$
D
$Inhibitor (blocks active site)$

Explanation

Inorganic ions (e.g., Mg²⁺) = cofactors; organic helpers (e.g., NAD⁺, vitamins) = coenzymes.

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