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nmdcat.online June 29, 2026

The amino acid classified as basic due to its positively charged side chain at physiological pH is

A. Aspartic acid
B. Glutamine
C. Lysine
✓
D. Serine

📝 Explanation

Basic amino acids have side chains that accept protons. Lysine contains an ε-amino group that is positively charged at physiological pH.

📖 Additional Information

  • Aspartic acid
  • Glutamine
  • Lysine
  • Serine

Basic amino acids have side chains that accept protons. Lysine contains an ε-amino group that is positively charged at physiological pH.

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