Q. 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: Aspartate and glutamate
A. Aspartate and glutamate
B. Arginine and histidine
C. Cysteine and methionine
D. Proline and valine
Answer: Aspartate and glutamate