Home » The pH optima of most of the enzymes is Enzymology MCQs The pH optima of most of the enzymes is January 22, 2022 32 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