Question

Plasmids are used as cloning vectors for which of the following reasons?

• (A) Can be multiplied in culture.
• (B) Self-replication in bacterial cells.
• (C) Can be multiplied in laboratories with the help of enzymes.
• (D) Replicate freely outside bacterial cells.

Answer 1

The Correct Option is A

Explanation:
Plasmids are used as cloning vectors because they can be multiplied in culture. Plasmids come in many different sizes and are used for many different purposes in biotechnology. They first made their mark in the field of recombinant DNA in the 1970s, being used as a tool to insert genes into bacteria to encourage their production of therapeutic proteins such as human insulin.Hence, the correct option is (A).

Answer 2

Plasmids are popular cloning vectors because they can replicate within cultured cells. They come in various sizes and serve multiple functions in biotechnology. In the 1970s, plasmids became essential in recombinant DNA technology, helping scientists insert genes into bacteria to produce therapeutic proteins like human insulin. Therefore, the correct answer is (A).