Read the following :
(a) Low temperature preserves the enzyme
(b) Enzyme gets denatured at high temperature
(c ) Enzyme does not get dnatured at high temperature
(d) Competitive inhibitor competes with the product formed
Which of the following statement are true ?

Options

A. (a) & (c )
B. (b) & (d)
C. (c ) & (d)
D. (a) & (b)

Answer

To determine which statements about enzymes are true, let's analyze each statement one by one:

1. **Statement (a): Low temperature preserves the enzyme.**
- Enzymes are proteins that can be affected by temperature. At low temperatures, enzyme activity decreases, but the enzyme itself is preserved in an inactive form. This means that the enzyme does not denature and can regain activity when the temperature rises to the optimum level.
- **Conclusion**: This statement is **true**.

2. **Statement (b): Enzyme gets denatured at high temperature.**
- Enzymes have an optimal temperature range for activity. When the temperature exceeds this optimal range, the enzyme's structure can become disrupted, leading to denaturation. Denaturation means that the enzyme loses its functional shape and, consequently, its activity.
- **Conclusion**: This statement is **true**.

3. **Statement (c): Enzyme does not get denatured at high temperature.**
- This statement contradicts the previous analysis. As explained, high temperatures can lead to the denaturation of enzymes, meaning they lose their functional shape and activity.
- **Conclusion**: This statement is **false**.

4. **Statement (d): Competitive inhibitor competes with the product formed.**
- Competitive inhibitors are molecules that resemble the substrate and compete for the active site of the enzyme. They do not compete with the product; instead, they compete with the substrate to bind to the enzyme.
- **Conclusion**: This statement is **false**.

**Final Analysis**: The true statements are (a) and (b). Therefore, the correct answer is that statements (a) and (b) are true.