Match the following.

Column-$I$	Column-$II$
$a$. Cristae	$i$. Flattened membrane sacs like structure present in stroma
$b$. Cisternae	$ii$. Infolding of mitochondria
$c$. Thylakoids	$iii$. Disc-shaped sacs
$d$. Kinetochores	$iv$. Disc-shaped structure present in chromosome

Which of the following is a vital stain?

Choose the correct statements regarding cell organelles and their inclusions.
$A$. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria.
$B$. Rough endoplasmic reticulum bears ribosomes on its surface.
$C$. Both mitochondria and plastids have circular $DNA$.
$D$. $A$ network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.
$E$. Mitochondrion is a single membrane-bound structure.
Choose the correct answer from the options given below:

Which components are responsible for the organization of a cell?

The normal $pH$ of protoplasm is:

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