Approximately how many restriction enzymes have been isolated from the different (over 230) strains of bacteria:

Options

A. 301
B. 600
C. 750
D. 900

Answer

**Step-by-Step Solution:**

1. **Understanding Restriction Enzymes**:
- Restriction enzymes are proteins that are isolated from bacterial strains. They recognize specific short nucleotide sequences in DNA and cut the DNA at specific sites.

2. **Identifying the Source**:
- These enzymes are derived from various strains of bacteria. In this case, we are considering over 230 different strains.

3. **Counting the Enzymes**:
- The question asks for the approximate number of restriction enzymes that have been isolated from these bacterial strains.

4. **Referencing Known Data**:
- Based on scientific research and data, it has been reported that approximately 900 restriction enzymes have been isolated from these 230 bacterial strains.

5. **Selecting the Correct Answer**:
- Given the options provided (301, 600, 750, and 900), the correct answer is 900.

**Final Answer**: Approximately 900 restriction enzymes have been isolated from different strains of bacteria.

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