Question

What are kind of cells

Answer 1

There are two basic kinds of cells: prokaryotic cells and eukaryotic cells. Prokaryotes, bacteria and archaea, are simple cells that have no cell nucleus. They do have bacterial microcompartments. Eukaryotes are complex cells with many organelles and other structures in the cell.

Answer 2

Hey there!

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Cells are classified in two categories on the basis of complexity of structure and presence of proper nucleus -:

• Prokaryotic cells
• Eukaryotic cells
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=> Prokaryotic cells - These type of cells are found in bacteria and blue - green algae (cynobacteria)

• They have size between 1 - 10 u.

• They don't have nucleus.

• Nuclear material (DNA) lies naked in the centre of the cell.

• Nuclear material is in direct contact with cytoplasm.

• Region of cytoplasm with contact of nuclear material is called nucleoid.

• Prokaryotic chromosomes of this type of cell is formed of single circular DNA molecule.

• Some small circular DNA molecule which are known as plasmids are present too.

• DNA is not connected with the basic protein called Histone
.
• Organnels like mitochondria, Golgi apparatus, plastids, ER (Endoplasmic Reticulum) , lysosomes are absent.

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=> Eukaryotic cells - These cells are found in all the living organisms, except bacteria and cynobacteria.

• They have size varying from 5 u to 100 u.

• They have well organised nucleus with a proper nuclear membrane.

• Since it has a proper nuclear membrane, the nuclear material / hereditary material is not in contact with cytoplasm.

• DNA of eukaryots remains bounded with basic proteins (histone).

• All the Organnels like mitochondria, dictyosomes, Golgi apparatus, chloroplasts , etc are present.

• Multiple chromosomes are present, more than one are there. 46 chromosomes in 23 pairs.

• Ribosomes are quite bigger, Ribosomes in these type of cells are either connected to ER or are free.


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Hope it helps...!!!