Question

Plasmid vector in recombinant DNA technology means

• A. any fragment of DNA carrying a desirable gene
• B. a virus that transfers genes to the bacteria
• C. an extrachromosomal autonomously replicating DNA
• D. a gene that does not replicate but readily incorporate into the host DNA

Answer 1

The correct option is C an extrachromosomal autonomously replicating DNA

Plasmid is a small double-stranded DNA molecule, distinct from the cell’s chromosomal DNA (extrachromosomal), which are capable of replicating independently of the cell’s DNA.
Plasmids are used experimentally to insert a gene of interest to make the clone of that particular gene sequence in the vector. A vector is derived from the naturally occurring plasmids, which has the ability to undergo self-replication, has multiple cloning sites and may have antibiotic-resistant genes.