What is the region in bacteria where the genetic material is located called?

Which of the following is incorrect regarding the inclusion bodies found in prokaryotic cells?

Identify the error in the following sentence:
"In prokaryotic cell internal extension structure called mesosome."

Read the sentences properly and select the correct option for mesosome.
$(i)$ Mesosome is an extension of the plasma membrane.
$(ii)$ These extensions are only in the form of spheres.
$(iii)$ Mesosomes help in cell wall formation and $DNA$ replication (not $RNA$ synthesis).
$(iv)$ They help in respiration.

Which of the following is a characteristic of a prokaryotic cell?

An episome is a: