Question

3 multiple choice 1 point following is the structure of an amino acid: h h o h - n - c - c - oh r predict the charge of this amino acid at a ph of 1. zwitterion positive negative stay uncharged

Explanation:

Step1: Understand amino - acid behavior at low pH

At low pH (such as pH = 1), the amino group ($-NH_2$) of the amino - acid can accept a proton ($H^+$).
The amino group in the amino - acid has the following reaction: $-NH_2+H^+
ightleftharpoons -NH_3^+$.
The carboxyl group ($-COOH$) is less likely to lose a proton at low pH.

Step2: Determine the charge

Since the amino group becomes $-NH_3^+$ and the carboxyl group remains $-COOH$, the overall charge of the amino - acid is positive.

Answer:

Positive