Cell theory was given by

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.

Name the cell organelle responsible for intracellular transport.

Which of the following cell organelles lacks a cell membrane?

Cell theory was given by

Functional segments of $DNA$ are called