What is the purpose of using plasmid DNA as a vector in genetic engineering?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) - To deliver an alien piece of DNA into the host organism
In genetic engineering, plasmid DNA is used as a vector to deliver an alien piece of DNA (foreign DNA) into the host organism. Plasmids are small, circular, autonomously replicating DNA molecules found in bacteria.
They act as carriers or vehicles to transfer the desired DNA into the host cell, allowing the introduced DNA to be replicated and expressed within the host organism.
This process enables the genetic modification of the host by incorporating specific genes of interest, such as antibiotic resistance genes or genes that encode desirable traits.