A) plasmids
B) retroposons
C) transposons
D) none of these
Correct Answer: C
Solution :
Barbara McClintock discovered motile genetic elements or transposons. Transposons are DNA segments, which discapable of changing their location within a chromosome or between chromosomes. Simplest type of transposon are insertion sequence. Plasmid is a circular, extra chromosomal body within a bacterial cell. That is capable of independent replication and transmission. The 3 widely studied plasmids are F plasmid?Responsible for conjugation R plasmid?Carrier genes for resistance to antibiotics Col plasmid?Codes for colicins, the protein that kills sensitive E. coli cells, they also carry genes that provide immunity to the particular colicin. Retroposon is a type of transposons found in the DNA of various organisms that form copies itself using a mechanism similar to that of Retro viruses.
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