Question

The incorrect statement regarding enzymes is:

• A. Enzymes are biocatalysts.
• B. Like chemical catalysts enzymes reduce the activation energy of bio processes.
• C. Enzymes are polysaccharides.
• D. Enzymes are very specific for a particular reaction and substrate.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Enzymes are complex biological molecules that act as catalysts in living organisms. Their nature and function are fundamental to biochemistry.
Step 2: Detailed Explanation:
Evaluation of Statements:
1. Statement (1): Enzymes speed up biochemical reactions within cells. They are indeed known as biocatalysts. (Correct)
2. Statement (2): Catalysts work by providing an alternative reaction pathway with a lower activation energy ($E_a$). Enzymes function exactly this way to speed up metabolic reactions. (Correct)
3. Statement (3): Chemically, almost all enzymes are globular proteins (polypeptides). They are not polysaccharides (which are carbohydrates like starch or cellulose). (Incorrect)
4. Statement (4): Enzymes have specific "active sites" that fit only specific substrate molecules, much like a lock and key. This makes them highly specific. (Correct)
Step 3: Final Answer:
The incorrect statement is that enzymes are polysaccharides.