Answer: Small circular extrachromosomal DNA in bacteria (used as vector).
- A A viral DNA genome that is packaged tightly inside a protein capsid
- B Small circular extrachromosomal DNA in bacteria (used as vector)
- C A restriction enzyme that cuts DNA at specific recognition sites
- D A type of ribosome complex involved directly in protein translation
Correct answer: B. Small circular extrachromosomal DNA in bacteria (used as vector)
Explanation: Plasmid: small circular DNA in bacteria, separate from chromosomal DNA. Used as vectors to carry foreign genes in recombinant DNA technology.
Recombinant DNA technology: a gene of interest and plasmid are cut by the same restriction enzyme, ligated into a recombinant plasmid, and introduced into a host cell.
Concept context
Recombinant DNA, GMOs, PCR, CRISPR, and biotechnology applications. Growing importance in NEET.
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