Question

Zymogens are

• A. Enzyme acting upon starch
• B. Group of zymase enzymes
• C. Inactive enzyme precursors
• D. None of the above

Answer 1

Answer: (C)

Inactive enzyme precursors

Enzymes are often produced in inactive form called as proenzymes or zymogens. Example: trypsinogen, pepsinogen etc. Proenzymes are converted into active forms under specific conditions. For example : pepsinogen and trypsinogen are autocatalytically converted to pepsin and trypsin respectively. Other factors are also involved example hydrochloric acid of stomach for converting pepsinogen and enterokinase for converting trypsinogen.