Mitochondria are non-existent in

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

In prokaryotes,the mesosome performs a function similar to that of a:

Nucleic acids in chromosomes in bacteria are

In the cytoplasm,high numbers of inclusion bodies are called........

Which of the following statements about a bacterial cell is/are correct?
$(i)$ Mesosome is formed by the extensions of plasma membrane into the cell.
$(ii)$ The pili are elongated tubular structures made up of a protein.
$(iii)$ Flagellum is composed of filament,hook,and basal body.
$(iv)$ Ribosomes are about $30 \; nm$ by $50 \; nm$ in size.