"An enzyme is a protein with catalytic property " was stated by

Options

A. Louis Pasteur
B. Dixon and Web
C. Haldane
D. Northrop

Answer

To solve the question "An enzyme is a protein with catalytic property" was stated by which scientist, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks who stated that enzymes are proteins with catalytic properties. This involves identifying the contributions of various scientists mentioned in the options.

2. **Analyze Each Option**:
- **Lewis-Pasteur**: He studied fermentation and proposed that certain chemical substances (ferments) are involved in this process. However, he did not specifically state that enzymes are proteins with catalytic properties.
- **Dixson and Webb**: They contributed to the classification of enzymes based on their catalytic activity but did not define enzymes as proteins.
- **Northrop**: He was known for crystallizing enzymes like trypsin, pepsin, and chymotrypsin but did not make the specific statement about enzymes being proteins with catalytic properties.
- **Haldane**: He conducted significant studies on enzymes in the 1930s and explicitly stated that enzymes are proteins that possess catalytic activity.

3. **Identify the Correct Answer**: Based on the analysis, it is clear that Haldane is the scientist who stated that "an enzyme is a protein with catalytic property."

4. **Conclusion**: The correct answer to the question is **Haldane** (Option C).