20
QuizMultiple Choice

Building Blocks of Life — Test

Question 20 • Biology

Which is released during the formation of a peptide bond?

Answer
A
a five-carbon sugar
B
a water molecule
C
an amino group
D
an amino acid

Explanation

A peptide bond forms when the amino group of one amino acid joins the carboxyl group of another. This dehydration reaction removes an –OH and an –H, which combine to form and release a water molecule, so the correct choice is “a water molecule.”

AI-written and checked against the verified answer.

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