The two amino acids having R groups with a negative net charge at pH 7.0 are
A. Aspartate and glutamate
B. Arginine and histidine
C. Cysteine and methionine
D. Proline and valine
Answer:A
The two amino acids having R groups with a negative net charge at pH 7.0 are
A. Aspartate and glutamate B. Arginine and histidine C. Cysteine and methionine D. Proline and valine