When a living plant cell loses water through osmosis,there is contraction of the contents of the cell away from the cell wall. What is this phenomenon called?

Name the functional unit of $DNA$ that carries genetic information.

Purkinje identified the fluid substance of the cell and named it as

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

$(a)$ What is $DNA$? Where is it found?
$(b)$ Name the functional segment of $DNA$.

Identify the type of cell and write one characteristic feature for each of the following descriptions:
$(i)$ Large vacuole,nucleus pushed to the periphery.
$(ii)$ Cell does not burst even in a very dilute medium.
$(iii)$ Nuclear region is not well-defined and is known as the nucleoid.