How does the structure of glutamic acid differ from aspartic acid, and how does this affect its ability to donate a hydrogen ion?

• A. Glutamic acid has a hydroxyl group instead of a carboxyl group.
• B. Glutamic acid has an extra CH2 group, allowing it to donate a hydrogen ion more easily.
• C. Glutamic acid cannot donate a hydrogen ion.
• D. Glutamic acid has a shorter carbon chain than aspartic acid.

Answer: (B)