Question

multiple choice question
beyond the primary structure of the order of amino - acids in a protein chain, there are up to ______ levels of folding and association that lead to significant complexity and functional specificity.
o three
o four
o five
o six
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Explanation:

Proteins have four levels of structure - primary, secondary, tertiary, and quaternary - beyond the simple sequence of amino - acids (primary structure). These levels of folding and organization contribute to their complexity and functional specificity.

Answer:

Four