Molecular weight of the smallest enzyme (bacterial ferredoxin) is

Options

A. 6000
B. 5400
C. 4500
D. 3500

Answer

To determine the molecular weight of the smallest enzyme, bacterial ferredoxin, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Enzyme**: The question asks for the molecular weight of the smallest enzyme, which is bacterial ferredoxin.

2. **Understand Ferredoxin**: Ferredoxins are iron-sulfur proteins that play a crucial role in electron transfer in various metabolic reactions. They are important in both prokaryotic and eukaryotic organisms.

3. **Historical Context**: Bacterial ferredoxin was first isolated in 1962 from anaerobic bacteria. This historical context helps us understand the significance of the enzyme.

4. **Source of Isolation**: The specific anaerobic bacteria from which bacterial ferredoxin was isolated is *Clostridium pasteurianum*. This information is relevant because it identifies the origin of the enzyme.

5. **Determine Molecular Weight**: The molecular weight of bacterial ferredoxin is approximately 6,000 Daltons. This value is recognized as the smallest molecular weight for an enzyme.

6. **Select the Correct Option**: Based on the provided options (6,000, 50, 400, 4,500, 3,500), the correct answer is 6,000 Daltons.

### Final Answer:
The molecular weight of the smallest enzyme, bacterial ferredoxin, is **6,000 Daltons**.

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