Question

Isoenzymes can be best defined as

• A. the different molecular forms of an enzyme having the same function
• B. the same molecular form of an enzyme having different functions
• C. the different molecular forms of an enzyme having different functions
• D. the same molecular forms of an enzyme having the same function

Answer 1

Answer: (A)

the different molecular forms of an enzyme having the same function

Answer 2

Isoenzymes or isozymes are defined as enzymes present in more than one molecular forms within the same tissue or organ but all the forms perform the same function. For e.g., there are about $5$ isoenzymatic forms of lactic dehydrogenase which catalyze the same biological reaction.