Naturally Occurring, Self-Replicating, Extra-Chromosomal DNA Molecules Found in Bacteria That

Multiple Choice

Naturally occurring, self-replicating, extra-chromosomal DNA molecules found in bacteria that carry genes specifying novel metabolic capacity advantageous to the bacterium are called:

A) probes.
B) cruciform.
C) toroidal DNA.
D) plasmids.
E) all of the above.