Naked $DNA$ is that which is

$A$ hereditary element that may be attached to a chromosome or found free in the cytoplasm is called:

The $DNA$ of $E. coli$ is

Identify the correct group of prokaryotic cells from the following list:
$1.$ Egg of ostrich,$2.$ $PPLO$,$3.$ Tracheid,$4.$ Blue-green algae,$5.$ Bacteria,$6.$ Animal cells.

In $Escherichia$ $coli$,which of the following is true?

Which of the following is not found in bacteria?