Question: What's the difference between a plasmid and a vector?
- PLASMIDS are extrachromosomal DNA molecules that can replicate independently. They are mostly circular and double-stranded. They carry beneficial genes responsible for Antibiotic resistance, degrading Aromatic compounds etc.. eg: Ti Plasmids(Tumour inducing)
- VECTORS, These are vehicles, essentially used to deliver Nucleic acids(mostly DNA) to the desired host. eg: Bacteriophages, Bacterial artificial chromosomes(BAC)
Note: Plasmids are the commonly used vectors because of their desired characteristics. If the size of the foreign DNA is large other vectors like BAC and YAC are used.