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The primary structure of a protein molecule has
a. Two ends
b. One end
c. Three ends
d. No ends

Answers (1)

The primary structure of a protein has a linear sequence of amino acids in a polypeptide chain which is held together by peptide bonds. These are two ends of a polypeptide chain, the carboxyl terminus (C-terminus) and the amino terminus (N-terminus) based on the nature of the free group on each other extremities. Hence, Option (a) is the correct answer.

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