Q.3 Write short notes on the following.
(a) Cytoplasm
(b) Nucleus of a cell

(a) Cytoplasm:

Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is contained within cells in the space between the cell membrane and the nuclear membrane. It is composed of water, salts, and various organic molecules. The cytoplasm is responsible for holding the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also responsible for giving the cell its shape.

(b) Nucleus of a cell

Nucleus of a cell is an important component of a cell. It is located at the centre of the cell. It is separated from the cytoplasm by a membrane called nuclear membrane. The nucleus is a membrane-bound organelle that contains genetic material. It has a fluid like substance called as nucleoplasm which is protected inside the nuclear membrane. Nuclear membrane has pores present in it, called as nuclear pores, which is responsible for the exchange of food, gaseous particles and waste between the nucleus and the cytoplasm.