The segment of DNA between chromosal and extrachromosal DNA molecules within the cells are -
TRANSPOSABLE GENETIC ELEMENTS Ceain structurally and genetically discrete segments of DNA have been identified that have the ability to move around in a cut and paste manner between chromosomal and extrachromosomal DNA molecule within the cells. These DNA molecules are called transposons(jumping genes) A transposon is a segment of DNA with one or more genes in the center and the two winds carrying inveed repeat sequences of nucleotides -nucleotides sequence complementary to each other but in reverse order. Because of this feature, each strand of the transposon can form a single-stranded loop carrying the gene and a double-stranded stem formed by hydrogen bonding between the terminal inveed repeated sequences. Small transposons are known inseion sequences or are. transposon attach at ceain regions of chromosomal, plasmid or phage DNA. Inseion of a transposon leads to the acquisition of new characteristic by the recipient DNA molecule. Unlike plasmids, transposons are not self-replicating and depend on chromosomal or plasmid DNA for replication REF:Ananthanarayan and Panicker's Textbook ofMicrobiology 8thEdition pg no: 67
Transposons
Cosmid
Plasmid
Episomes
general microbiology