Maximum number of bases in plasmids discovered so far:
Correct answer: B. 500 kilo base
- A. 50 kilo base
- B. 500 kilo base
- C. 5000 kilo base
- D. 5 kilo base.
Explanation
A plasmid is a DNA molecule separate from the chromosomal DNA and capable of autonomous replication. In many cases, it is typically circular and double-stranded. It usually occurs in bacteria and is sometimes found in eukaryotic organisms. The size of plasmids varies from 1 to over 400 kilobase pairs (kbp). There may be one copy, for large plasmids, to hundreds of copies of the same plasmid in a single cell. The term plasmid was first introduced by the American molecular biologist Joshua Lederberg in 1952.
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