There is a restriction endonuclease called EcoRI. What does 'co' part in it stand for?

Options

A. coli
B. colon
C. coelom
D. coenzyme

Answer

To answer the question regarding what the 'co' part in the restriction endonuclease EcoRI stands for, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Name Structure**: The name EcoRI can be broken down into three parts: E, Co, and R1. Each part has a specific meaning related to the organism from which the enzyme is derived and its classification.

2. **Understand the First Part (E)**: The 'E' in EcoRI stands for the genus of the organism, which is *Escherichia*.

3. **Analyze the 'Co' Part**: The 'Co' in EcoRI refers to the species name. In this case, it stands for *coli*, which is the species name of the bacterium *Escherichia coli*.

4. **Examine the Remaining Parts**: The 'R' in EcoRI indicates that it is a restriction enzyme, and the '1' signifies that it is the first enzyme discovered from this particular strain.

5. **Conclusion**: Therefore, the 'co' in EcoRI stands for *coli*, indicating that the enzyme is derived from *Escherichia coli*.

### Final Answer:
The 'co' part in EcoRI stands for *coli*.

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