First identified enzyme was

Options

A. Protease
B. Lipase
C. Zymase
D. Urease

Answer

**Step-by-Step Solution:**

1. **Understanding Enzymes**: Enzymes are biological catalysts that speed up biochemical reactions in living organisms. They are crucial for various metabolic processes.

2. **Identifying the First Enzyme**: The question asks for the first identified enzyme. Among the options provided (protease, lipase, ximase, urease), we need to determine which one was identified first.

3. **Historical Context**: The first enzyme to be identified was ximase, which was discovered by the scientist Eduard Buchner in 1897. This discovery was significant in the field of biochemistry.

4. **Isolation of Ximase**: Buchner isolated ximase from yeast extract, which demonstrated that enzymes could function outside of living cells, marking a pivotal moment in the study of enzymes.

5. **Conclusion**: Based on this historical context, the correct answer to the question is that the first identified enzyme was ximase.

**Final Answer**: The first identified enzyme was ximase.

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