Question

Identify correct statements about 'Enzyme'. A. Enzymes are the protein biocatalysts which are synthesized by the living cells. B. An enzyme is specific in its action, possessing active site. C. Enzyme activities are inhibited by only reversible manner. D. Many enzymes require certain non-protein substrate called cofactor for their action. E. Estimation of serum enzymes is of great help in the diagnosis of several diseases. Choose the correct answer from the options given below:

• A. A, B, C, D only
• B. B, C, D, E only
• C. A, B, D, E only
• D. A, B, C, E only

Hint:

Remember that enzyme activities can be inhibited in both reversible and irreversible ways.

Answer 1

The Correct Option is C

Step 1: Concept
Enzyme characteristics and functions

Step 2: Meaning
Understanding the properties of enzymes such as their nature, specificity, regulation, cofactors, and diagnostic roles.

Step 3: Analysis
Option A is correct since enzymes are indeed proteins synthesized by living cells. Option B states enzyme specificity accurately, mentioning active sites. Option D correctly identifies that many enzymes require cofactors for action. However, enzyme activities can be inhibited in both reversible and irreversible manners, so option C incorrectly excludes option B. Option E is true regarding the diagnostic value of serum enzymes.

Step 4: Conclusion
The correct combination includes A, B, D, and E but not C due to incorrect exclusion of B. Final Answer: (C)