write a short note on
(1) cytoplasm
(2) nucleus of a cell
Answers
Answer:
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Explanation:
(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 spherical round body present in the centre of the cell is called nucleus.
It is an important component of the living cell.
Nucleus is separated from the cytoplasm by a membrane called the nuclear membrane.
The nuclear membrane is porous and allows the movement of materials between the cytoplasm and nucleus.
(a) Cytoplasm
*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.
*Most of the metabolic reactions also occur inside cytoplasm.
(b) Nucleus of a cell
*The spherical round body present in the centre of the cell is called nucleus.
*It is an important component of the living cell.
*Nucleus is separated from the cytoplasm by a membrane called the nuclear membrane.
*The nuclear membrane is porous and allows the movement of materials between the cytoplasm and nucleus.
*The nucleus consists of a spherically shaped dense mass called nucleolus. Nucleus also contains thread-like structures called chromosomes. These carry genes and help in inheritance or transfer of characters from the parents to the offspring.