Which of the following organelles are membrane-less?

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

Given below are two statements:
Statement $I$: Mitochondria and chloroplasts are both double-membrane-bound organelles.
Statement $II$: The inner membrane of mitochondria is relatively more permeable compared to the inner membrane of chloroplasts.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following cell organelles were discovered after the introduction of electron microscope?

Which microscope is used to study the dynamic type of cells?

Which of the following structures contains enzymes?