The cell wall of which of these is not made up of cellulose?

Name the single membrane-bound cell organelle which is found in an animal cell.

The cell organelle in which materials such as starch, oils, and protein granules are stored is

How are the following related to each other?
$(a)$ Chromatin network and chromosomes.
$(b)$ Chloroplast and chlorophyll.
$(c)$ Genes and $DNA$.

Give short answers:
$(i)$ What is the role of proteins and lipids in the plasma membrane?
$(ii)$ Why is the plasma membrane called selectively permeable?
$(iii)$ What is the role of cellulose in the cell wall?
$(iv)$ What is meant by plasmolysis?
$(v)$ What is the advantage of the flexibility of the cell membrane?
$(vi)$ Name the process which is useful for the movement of substances like $CO_{2}$ and $O_{2}$ across the cell membrane.

Who observed the cell for the first time and when?