2. Write short notes on the following:
(a) Cytoplasm.
(b) Nucleus of a cell.
Answers
Answer:
(a) Cytoplasm:
It is a fluid that fills the cell and occurs between the plasma membrane and the nucleus.
Cell organelles such as mitochondria, ribosomes, Golgi bodies, etc., are suspended in the cytoplasm.
The cytoplasm helps in the exchange of materials between cell organelles.
(b) Nucleus of a cell:
The nucleus is the master of the cell. It commands all the functioning of the cell.
It is generally located in the centre of the cell and is spherical in shape.
A membrane called a nuclear membrane separates it from the cytoplasm.
It contains the genetic material DNA and RNA.
Answer:
Cytoplasm is a jelly-like substance between the nucleus and the cell membrane. Various cell organelles like ribosomes, mitochondria, endoplasmic reticulum, etc. are suspended in the cytoplasm. It helps in exchange and storage of substances among cell organelles.
Explanation:
(b) Nucleus of a cell:
It is generally located in the centre of the cell and is spherical in shape. A membrane called a nuclear membrane separates it from the cytoplasm. It contains the genetic material DNA and RNA. This porous membrane allows the transfer of material in the nucleus and cytoplasm.