The enzyme are killed :

Options

A. at a very high temperature
B. diuring the chemical reaction
C. at low temperature
D. under atmospheric pressure

Answer

**Step-by-Step Text Solution:**

1. **Understanding Enzymes**: Enzymes are biological catalysts that speed up chemical reactions in living organisms. They are primarily made of proteins and have specific active sites where substrates bind.

2. **Conditions Affecting Enzyme Activity**: Enzymes are sensitive to various environmental conditions, including temperature, pH, and concentration of substrates or inhibitors.

3. **High Temperature Effects**: When the temperature exceeds a certain threshold, the structure of the enzyme can be disrupted. This process is known as denaturation. The active site of the enzyme changes shape, making it unable to bind to its substrate effectively.

4. **pH Levels**: Enzymes also have an optimal pH range. If the pH is too high or too low, it can lead to denaturation of the enzyme, resulting in loss of activity.

5. **Chemical Inhibitors**: Certain chemicals can inhibit enzyme activity by binding to the active site or altering the enzyme's structure, effectively "killing" the enzyme's function.

6. **Conclusion**: Enzymes are killed or rendered inactive due to extreme conditions such as high temperatures, unfavorable pH levels, or the presence of inhibitors.

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