Who is given credit for constructing first atrificial recombinant molecule ?

Options

A. Hargovind Khorana
B. Staniey Cohen and Herbert Boyer
C. Linus pauling
D. Arber and Nathans

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who is credited with constructing the first artificial recombinant molecule. This requires knowledge of the history of biotechnology and key figures involved in recombinant DNA technology.

2. **Identifying Key Figures**: The options provided are Hargobind Khurana, Stanley Cohen and Herbert Boyer, Linus Pauling, and Arbor and Nathans. We need to analyze the contributions of each of these scientists to determine who constructed the first artificial recombinant molecule.

3. **Historical Context**: The first artificial recombinant DNA molecule was constructed in 1972. This is a crucial date that helps narrow down our options.

4. **Researching Contributions**:
- **Stanley Cohen and Herbert Boyer**: They are known for their work in recombinant DNA technology. They successfully combined DNA from different organisms to create a new, artificial recombinant DNA molecule.
- **Hargobind Khurana**: He is known for his work on the genetic code but did not construct the first recombinant DNA molecule.
- **Linus Pauling**: A chemist known for his work in chemistry and molecular biology, but not specifically for recombinant DNA.
- **Arbor and Nathans**: They are recognized for their work on restriction endonucleases, which are tools used in recombinant DNA technology, but they did not construct the first recombinant molecule.

5. **Conclusion**: Based on the historical contributions, Stanley Cohen and Herbert Boyer are credited with constructing the first artificial recombinant molecule. Therefore, the correct answer is **Stanley Cohen and Herbert Boyer**.

**Final Answer**: Stanley Cohen and Herbert Boyer are given credit for constructing the first artificial recombinant molecule.

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