A number of bacteria with recombinant DNA of same type form :

Options

A. clone library
B. gene library
C. gene pool
D. gene frequency

Answer

To answer the question, "A number of bacteria with recombinant DNA of the same type form:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Recombinant DNA**:
- Recombinant DNA is formed by combining DNA from different sources. In this case, we are considering bacteria that contain the same type of recombinant DNA.

2. **Identifying the Purpose of Recombinant DNA in Bacteria**:
- When bacteria contain the same recombinant DNA, they can replicate this DNA, leading to the production of multiple copies of the same genetic material.

3. **Defining a Genomic Library**:
- A genomic library is a collection of the total genomic DNA from a single organism. It allows for the study and manipulation of the genes present in that organism.

4. **Understanding Cloning in Bacteria**:
- When bacteria with the same recombinant DNA multiply, they create clones. Each bacterium replicates the same DNA, resulting in a population of genetically identical cells.

5. **Distinguishing Between Different Types of Libraries**:
- A clone library specifically refers to a collection of clones that contain the same recombinant DNA. This is different from a gene library or a gene pool, which may include a variety of different genetic materials.

6. **Conclusion**:
- Therefore, when a number of bacteria with recombinant DNA of the same type are present, they form a **clone library**.

### Final Answer:
The correct answer is: **Clone Library**.