Which property of proteins enables them to act as pH buffers?
Correct answer: B. They contain carboxyl and amino groups
- A. They are insoluble
- B. They contain carboxyl and amino groups
- C. They have a low molecular mass
- D. They possess only secondary
Explanation
Option B is correct. The property of proteins that enables them to act as pH buffers is their amphoteric nature. This means that they have both acidic and basic properties. The acidic and basic properties of proteins are due to the amino acids that make up the protein. Amino acids have an amino group (-NH2) and a carboxyl group (-COOH). The amino group is basic, and the carboxyl group is acidic.
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