The enzymatic activity stops due to ...................... of enzymes at very high temperature

Explanation

**Step-by-Step Solution:**

1. **Understanding Enzymes**: Enzymes are proteins that act as biological catalysts, speeding up chemical reactions in living organisms.

2. **Effect of Temperature on Enzymes**: Temperature is a crucial factor that affects enzyme activity. Each enzyme has an optimal temperature range in which it functions best.

3. **Denaturation of Enzymes**: When the temperature exceeds the optimal range, particularly at very high temperatures, enzymes can undergo a process called denaturation. This means that the structure of the enzyme is altered.

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