Which of the following sets of cell organelles contain $DNA$?

Match column-$I$ and column-$II$ and select the correct answer.

Column-$I$	Column-$II$
$A$. Bacteria without walls	$I$. Lysosome
$B$. Small circular $DNA$	$II$. Mycoplasma cells
$C$. Flattened sacs in a chloroplast	$III$. Thylakoid
$D$. $A$ vesicle in which hydrolytic enzymes are stored	$IV$. Plasmid

Which of the following pairs is mismatched?

Which of the following statements are correct?
$I$. $PPLO$ is the smallest cell.
$II$. Prokaryotic cells are smaller than eukaryotic cells.
$III$. Cell division in prokaryotic cells is slow.
$IV$. All bacteria show solitary and colonial forms.
$V$. Cell division in prokaryotic cells is very rapid.

Match the Column-$I$ with Column-$II$.

Column-$I$	Column-$II$
$(a)$ Golgi apparatus	$(i)$ Synthesis of protein
$(b)$ Lysosomes	$(ii)$ Trap waste and excretory products
$(c)$ Vacuoles	$(iii)$ Formation of glycoproteins and glycolipids
$(d)$ Ribosomes	$(iv)$ Digesting biomolecules

Choose the right match from the options given below.

The invention of the electron microscope led to a major breakthrough in the study of cells. What could be the reason for this?