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.

Question

Quizplus · Accepted Answer

Plasmids are self-replicating extra-chromosomal DNA molecules found in bacteria that carry genes specifying novel metabolic capacity advantageous to the bacterium. Choice A, probes, are small fragments of DNA or RNA used to detect specific sequences in a sample. Choice B, cruciform, describes a DNA structure where the double helix folds into a cross shape. Choice C, toroidal DNA, refers to DNA that loops back on itself to form a doughnut shape.

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