In the protein buffer system, when pH falls, ______ dissociates and acts like a base to restore the body's pH.

In the protein buffer system, when pH falls, ______ dissociates and acts like a base to restore the body's pH.

In the protein buffer system, when pH falls, ______ dissociates and acts like a base to restore the body's pH.



A. carboxyl group
B. carbonic acid
C. free amino acid group





Answer: C


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