Question:easy
By which method is foreign DNA introduced into a cell by a virus or viral vector?
By which method is foreign DNA introduced into a cell by a virus or viral vector?
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Virus-mediated DNA transfer = transduction; naked DNA uptake = transformation.
Updated On: Jun 24, 2026
- Transduction
- Transcription
- Lysogenic conversion
- Transformation
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The Correct Option is A
Solution and Explanation
Step 1: Focus on the carrier. The key word is that a virus or viral vector physically delivers the DNA into the cell.
Step 2: Name the process. Genetic transfer mediated by a bacteriophage or viral vector is termed transduction, the mechanism by which DNA is shuttled from one bacterium into another inside a viral particle.
Step 3: Separate the rest. Transcription is DNA-to-RNA synthesis. Lysogenic conversion describes new traits a host gains once a prophage is incorporated. Transformation is the direct uptake of free DNA without any vector. Only one involves a virus as the courier.
The viral courier mechanism gives the answer.\[\boxed{\text{Transduction}}\]
Step 2: Name the process. Genetic transfer mediated by a bacteriophage or viral vector is termed transduction, the mechanism by which DNA is shuttled from one bacterium into another inside a viral particle.
Step 3: Separate the rest. Transcription is DNA-to-RNA synthesis. Lysogenic conversion describes new traits a host gains once a prophage is incorporated. Transformation is the direct uptake of free DNA without any vector. Only one involves a virus as the courier.
The viral courier mechanism gives the answer.\[\boxed{\text{Transduction}}\]
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