Question:

What is a plasmid?

Updated On: Aug 1, 2022
  • Bacterial, linear, dsDNA
  • Extrachromosomal linear RNA
  • Extrachromosomal circular dsDNA
  • Autonomously replicating circular RNA
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The Correct Option is C

Solution and Explanation

Plasmid is a structure (loop) in bacterial cells consisting of DNA that can exist and replicate independently of the chromosome. These are extrachromosomal circular double stranded DNA (dsDNA) which provide genetic instructions for certain cell activities (e.g. resistance to antibiotic drugs). They can be transferred from cell to cell in a bacterial colony. Plasmids are widely used as vectors to produce recombinant DNA for gene cloning.
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Biological Classification

The process of grouping living organisms into categories is called biological classification. The most modern 5-kingdom classification was put ahead by an eminent scientist R.H.Whittaker. The five-kingdom classification is based on the criteria like cell structure, mode of nutrition, body form, and reproduction. One of the most important characteristics of this system is that it follows the evolutionary sequence of living organisms. The organisms are classified into distinct taxa or levels like Kingdom, Phylum, Division, Class, Order, Family, Genus, and Species. The 5 kingdoms are as follows:

Biological Classification