Question

below is an image of a generic amino acid. click to highlight the functional groups that are involved in making a peptide bond. credit: adapted from figure 2 - b - 2 www.web - books.com/mobio/free/ch2b

Explanation:

Peptide bonds form between the amino group ($-NH_2$) and the carboxyl group ($-COOH$) of amino - acids. In the given generic amino - acid structure, the amino group ($^+H_3N -$) and the carboxyl group ($-COO^-$) are the functional groups involved in peptide bond formation.

Answer:

The amino group ($^+H_3N -$) and the carboxyl group ($-COO^-$) should be highlighted.