Question

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

Answer 1

Answer:

Positive, Negative

Explanation:

The charge of an amino acid is dependent on pH values of their pKa's. At pH 7, Basic amino acid will be positive because they have pH values below their pKa's while an R group amino acid will be negative