Home » Which enzyme is used by the biscuit manufacturers to lower the protein level of flour? Enzymology MCQs Which enzyme is used by the biscuit manufacturers to lower the protein level of flour? January 22, 2022 13 Views Q. Which enzyme is used by the biscuit manufacturers to lower the protein level of flour? A. Protease B. Xylanase C. Amylase D. Cellulase Answer: Protease