Question

Basic amino acids are ________ (positive, negative) at pH 7 and acidic R group amino acids are ________ (positive, negative) at pH 7. Basic amino acids are ________ (positive, negative) at pH 7 and acidic R group amino acids are ________ (positive, negative) at pH 7.

Answer 1

The correct answer will be-

1. Positive

2. Negative

Step-by-step explanation:

Amino acids are the building blocks of the protein molecule which is formed by the binding the amino acids in the chain via a peptide bond.

The amino acid is attached to four different groups on its four sides which includes the amino group, R group, carboxyl group and Hydrogen.

These attached groups to the amino acids determine the nature of the amino acid that is whether it will behave as an acidic molecule or basic molecule at physiological pH.

At pH 7, the attached amino group gets protonated and bears a positive charge making it a basic amino acid while the attached carboxyl group gets deprotonated making it negatively charged and thus acidic.

Thus, Positive and Negative is the correct answer.