Which option correctly identifies the parts labeled $a$ and $b$ in the given figure?

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?

Read Column-$A$ and Column-$B$ and select the correct option.

$1$. Mycoplasma	$p$. plant cell
$2$. Mesophyll cells	$q$. filament,hook and basal body
$3$. Capsule	$r$. Prokaryotic cell
$4$. Flagella	$s$. Glycocalyx

Non-membranous cell organelles are

In which of the following are plastids $NOT$ found?

The interconversion of $plasmasol$ and $plasmagel$ is known as: