$DNA$ is present in which of the following?

Consider the following statements and choose the correct statement.
$(i)$ The endomembrane system includes mitochondria,chloroplast and peroxisomes.
$(ii)$ Smooth endoplasmic reticulum is the major site for synthesis of lipid.
$(iii)$ Rough endoplasmic reticulum is actively involved in protein synthesis.
$(iv)$ Mitochondrial matrix possesses single circular $DNA$,a few $RNA$ and $80\; S$ ribosomes.
Which of the above statements are correct?

Match the following columns:

Column $I$ (Organelle)	Column $II$ (Function)
$(a)$ Golgi apparatus	$(i)$ Maintains turgor pressure in cells
$(b)$ Lysosomes	$(ii)$ Cellular respiration
$(c)$ Vacuoles	$(iii)$ Photosynthesis
$(d)$ Mitochondria	$(iv)$ Synthesis of glycolipids and glycoproteins
	$(v)$ Phagocytosis and pinocytosis

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

Column $X$	Column $Y$
$(1)$ Motile bacteria	$(P)$ Slime layer
$(2)$ Glycocalyx	$(Q)$ Ribosomes
$(3)$ Gas vacuole	$(R)$ Flagellin protein
$(4)$ $20 \, nm$ diameter	$(S)$ Autotrophic bacteria

Which stain is used for electron microscopy?

The endomembrane system includes $ . . . . . . $.