A) F- replicon
B) chromosomal replicon
C) RNA
D) sex pillies
Correct Answer: A
Solution :
In bacteria, besides nuclear DNA, there is some extrachromosomal or extranuclear DNA which is known as plasmid. Term plasmid was given by Lederberg (1952). On the basis of their function, the plasmids are of 3 types: (i) F or fertility factor: Responsible for transfer of genetic material (ii) R or resistance factor: Provides resistance against drugs. (iii) Colicinogenic factors: Provides colicines which kill other bacteria (other than which produce these colicines).
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