Which of the following has the smallest cell?

The given figure represents the structure of which organism?

Define/Explain the following terms:
$(i)$ Active transport
$(ii)$ Polysome
$(iii)$ Inclusion bodies

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 nucleic acids is present in an organism having $70S$ ribosomes only?

The $DNA$ of $E. coli$ is