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Q: Which one of the following amino acids is the most effective contributor of protein buffer?
  • A. Alanine
  • B. Glycine
  • C. Histidine
  • D. Arginine
Correct Answer: Option C - The most effective contributor to protein buffering capacity is histidine. This is because of its unique imidazole side chain, which can accept or donate protons, making it essential in maintaining pH levels within proteins.
C. The most effective contributor to protein buffering capacity is histidine. This is because of its unique imidazole side chain, which can accept or donate protons, making it essential in maintaining pH levels within proteins.

Explanations:

The most effective contributor to protein buffering capacity is histidine. This is because of its unique imidazole side chain, which can accept or donate protons, making it essential in maintaining pH levels within proteins.