What is the nuclear material of a bacterium?

Which of the following is not a structure of prokaryotic flagella?

What is the small,circular,extrachromosomal $DNA$ molecule found in a bacterial cell,separate from the main genomic $DNA$?

Identify the correct terms for the following analogy-based questions:
$(i)$ Smallest cell : $Mycoplasma$ :: Largest cell : ......
$(ii)$ Loose sheath in bacteria : $Slime$ layer :: Thick and tough sheath : ....

Which of the following structures in a prokaryotic cell is $NOT$ formed by the extension of the plasma membrane?

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.