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

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.

Prokaryotic cells are characterized by the absence of:

Which of the following types of cell division is found in prokaryotic cells?

Which structure helps in cell division in bacteria?

The outermost loose sheath layer in bacteria is known as: