Question

Enzymes are:

• A. Carbohydrates
• B. Lipids
• C. Proteins
• D. None of these

Hint:

Remember: All enzymes are proteins, but not all proteins are enzymes.

Answer 1

The Correct Option is C

Step 1: Definition.
Enzymes are biological catalysts that accelerate biochemical reactions in living organisms.
Step 2: Nature of enzymes.
Almost all enzymes are proteins in nature (except some catalytic RNAs known as ribozymes). They are highly specific in action and function under mild conditions of temperature and pH.
Step 3: Analysis of options.
(A) Carbohydrates: These act mainly as energy sources, not as enzymes.
(B) Lipids: Structural and storage roles, not catalytic.
(C) Proteins: Correct — enzymes are mainly globular proteins.
(D) None of these: Incorrect, since enzymes are proteins.
Step 3: Conclusion.
Thus, enzymes are proteins.