BIO NMDCAT Factors that Affect the Rate of Enzyme Reactions

nmdcat.online July 11, 2026

Regarding the effect of pH on enzyme action, alteration from the optimum pH mainly affects the

A. Molecular mass of the enzyme

B. Ionization of amino acid residues in the active site

✓

C. Number of peptide bonds in the enzyme

D. Chemical formula of the substrate

📝 Explanation

Changes in pH alter the charge of amino acid side chains, affecting substrate binding and catalytic activity without changing the enzyme's molecular mass.

📖 Additional Information

Molecular mass of the enzyme
Ionization of amino acid residues in the active site
Number of peptide bonds in the enzyme
Chemical formula of the substrate

Changes in pH alter the charge of amino acid side chains, affecting substrate binding and catalytic activity without changing the enzyme's molecular mass.

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