The pH optima of most of the enzymes is HomeEnzymology MCQsThe pH optima of most of the enzymes is Share your love WhatsApp Facebook Telegram Twitter Pinterest 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