All enzymes work best at the same optimum temperature and same pH.

Answer

### Step-by-Step Solution:

1. **Understanding the Statement**: The question states that "all enzymes work best at the same optimum temperature and same pH." This is a claim that needs to be evaluated.

2. **Identifying the Nature of Enzymes**: Enzymes are proteins that act as catalysts in biochemical reactions. Each enzyme has a unique structure and function, which is determined by its amino acid sequence.

3. **Exploring Optimum Conditions**: Each enzyme has specific conditions under which it operates most effectively, known as its optimum temperature and optimum pH. These conditions vary from one enzyme to another.

4. **Impact of Temperature on Enzymes**: As temperature increases, the kinetic energy of molecules increases, which can enhance enzyme activity up to a certain point. However, if the temperature exceeds the enzyme's optimum level, it can lead to denaturation, where the enzyme loses its functional shape and becomes inactive.

5. **Impact of pH on Enzymes**: Similarly, each enzyme has a specific pH range in which it is most active. Deviations from this pH can lead to changes in the enzyme's structure and function, potentially resulting in decreased activity or denaturation.

6. **Conclusion**: Since different enzymes have different optimum temperatures and pH levels, the statement that "all enzymes work best at the same optimum temperature and same pH" is false.

### Final Answer:
The statement is false because different enzymes have different optimum temperatures and pH levels at which they function best.

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