Write the two components of the first artificial recombinant DNA molecule constructed by Cohen and Boyer .

Explanation

To answer the question about the two components of the first artificial recombinant DNA molecule constructed by Cohen and Boyer, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Identify the Components**: The first step is to identify the two main components used in the construction of the recombinant DNA molecule by Cohen and Boyer.

2. **Component 1 - Plasmid**: The first component is the plasmid from the bacterium *Salmonella typhimurium*. Plasmids are small, circular pieces of DNA that exist independently of chromosomal DNA in bacteria. They can replicate independently and are often used as vectors in genetic engineering.

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