Which of the following structures is formed by the collective functioning of all membranous organelles in terms of their structure and function?

Read the following statements:
$(i)$. Membrane-bounded inclusion bodies are not found in prokaryotic cells.
$(ii)$. Ribosomes are the site of protein synthesis.
$(iii)$. Pili are the surface structure of the bacteria which may play a role in motility.
$(iv)$. The cell membrane of prokaryotes is structurally similar to the eukaryotes.
Choose the option with the correct statements.

Which stain is used for electron microscopy?

Select the correct match for $X$ and $Y$.

Column $X$	Column $Y$
$(1)$ Microfilament	$(P)$ Glycocalyx
$(2)$ Microtubule	$(Q)$ Actin
$(3)$ Flagella	$(R)$ Tubulin
$(4)$ Bacterial outer layer	$(S)$ Flagellin

Which of the following is not a part of the endomembrane system?

Match the following.

Column-$I$	Column-$II$
$(1)$ Typical bacterial	$(p)$ Site of protein synthesis
$(2)$ Ribosome	$(q)$ $1-2 \ \mu m$
$(3)$ Long and branched	$(r)$ Control of bacterial transformation
$(4)$ Plasmid	$(s)$ Nerve cell