Question

3. Write short notes on the following.
(a) Cytoplasm
(b) Nucleus of a cell
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Answer 1

Explanation:

a) Cytoplasm is a jelly-like substance between the nucleus and the cell membrane. Various cell organelles like ribosomes, mitochondria, endoplasmic reticulum, etc. ... It helps in exchange and storage of substances among cell organelles. Most of the metabolic reactions also occur inside cytoplasm

b)

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. ... Nucleus also contains thread-like structures called chromosomes.

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Answer 2

Cytoplasm

• Cytoplasm is a thick solution that fills each cell .
• It is enclose by cell membrane.
• All of the organelles in eukaryotic cells, such as the nucleus, endoplasmic reticulum, and mitochondria, are located in the cytoplasm.
• The portion of the cytoplasm that is not contained in the organelles is called the cytosol.

Nucleus of cell:-

• The nucleus of the cell is in the centre of the cell.
• It contains DNA n chromosomes.
• It was founded by Robert Brown in 1831.