Question

The protein part of enzyme is known as

• A. Holoenzyme
• B. Apoenzyme
• C. lsoenzyme
• D. All of the above

Answer 1

The correct option is B Apoenzyme

Enzymes are simple if they are made up of only proteins, e.g., pepsin, amylase etc., while conjugate enzymes have an additional non-protein cofactor, e.g., dehydrogenase enzymes. The cofactor can be organic or inorganic. Loosely attached organic cofactor are called coenzymes, e.g., NAD, FAD etc., while firmly attached one is prosthetic group, e.g., haeme, biotin etc. The protein part of conjugate enzyme is known as apoenzyme while the whole enzyme is called holoenzyme.

So, the correct answer is 'Apoenzyme'