Which option explains why this amino acid can act as both an acid and a base?

Question

(1 point)
Responses

It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can decrease acidity, while the carboxyl group can increase acidity.
It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can decrease acidity, while the carboxyl group can increase acidity.

It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can increase acidity, while the carboxyl group can decrease acidity.
It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can increase acidity, while the carboxyl group can decrease acidity.

It contains both an amino functional group and a methyl functional group. In a solution, the amino group can decrease acidity, while the methyl group can increase acidity.
It contains both an amino functional group and a methyl functional group. In a solution, the amino group can decrease acidity, while the methyl group can increase acidity.

It contains both an amino functional group and a methyl functional group. In a solution, the amino group can increase acidity, while the methyl group can decrease acidity.

Answer 1

The correct explanation for why the amino acid can act as both an acid and a base is:

It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can decrease acidity, while the carboxyl group can increase acidity.

This means that the amino group can accept a proton (acting as a base), while the carboxyl group can donate a proton (acting as an acid).