What is the difference between changing amino acid composition and sequence?

• A. Composition change only occurs at the C-terminal, while sequence change occurs at the N-terminal.
• B. Composition change involves adding or removing amino acids, while sequence change involves rearranging them.
• C. Composition change is reversible, while sequence change is permanent.
• D. Composition change affects the protein's secondary structure, while sequence change affects the tertiary structure.

Answer: (B)