Where are genes located?

Define and explain the importance of the following phenomena in living cells:
$(a)$ Diffusion
$(b)$ Osmosis.

$(a)$ What would happen to the life of a cell if there was no Golgi apparatus?
$(b)$ Which cell organelle detoxifies poisons and drugs in the liver of vertebrates?

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.

Which of the following organelles does not have a cell membrane?

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