Home » The pH optima of most of the enzymes is Enzymology MCQs The pH optima of most of the enzymes is January 22, 2022 5 Views Q. The pH optima of most of the enzymes is A. Between 2 and 4 B. Between 5 and 9 C. Between 8 and 12 D. Above 12 Answer: Between 5 and 9