Question

By which method foreign DNA is introduced into a cell by a virus or viral vector ?

• A. Transduction
• B. Transcription
• C. Lysogenic conversion
• D. Transformation

Answer 1

The Correct Option is A

The introduction of foreign DNA into a cell by a virus or viral vector is a method known as Transduction. This process involves the following steps:

1. Attachment: The viral vector attaches to the host cell's surface receptors.
2. Penetration: The viral genetic material, which includes foreign DNA, enters the host cell.
3. Integration: The foreign DNA is incorporated into the host cell's genome, usually by viral enzymes.
4. Expression: Once integrated, the foreign DNA is expressed by the host cell's machinery, leading to the production of new proteins or functions.