Who produced first recombinant DNA molecule?

Options

A. Arber, Smith and Nathans
B. Watson and Crick
C. Kornberg and H.G. Khorana
D. Boyer and Cohen

Answer

### Step-by-Step Text Solution:

1. **Identify the Question**: The question asks for the name of the scientist(s) who produced the first recombinant DNA molecule.

2. **Historical Context**: The first recombinant DNA molecule was produced in the early 1970s, specifically between 1972 and 1973.

3. **Key Scientists Involved**:
- The primary scientist credited with this achievement is **Paul Berg**.
- He collaborated with **Herbert Boyer** in this groundbreaking work.

4. **Additional Contributors**:
- Other notable scientists involved in the development of recombinant DNA technology include **Annie Chang** and **Stanley Cohen**.

5. **Conclusion**: Therefore, the first recombinant DNA molecule was produced by **Paul Berg and Herbert Boyer**, with contributions from **Annie Chang and Stanley Cohen**.

### Final Answer:
The first recombinant DNA molecule was produced by Paul Berg and Herbert Boyer, along with Annie Chang and Stanley Cohen.

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