Cell Organelles


Ribosomes Palade discovered ribosomes in 1953 in animals. Robinson and Brown discovered ribosomes in plant cells. Ribosomes are non-membranous bounded structures. Ribosomes are the sites where the cell synthesizes proteins according to genetic instructions. A bacterial cell may have a few thousand ribosomes. But a human liver cell has a few million ribosomes. Cells that have high protein synthesis have ...

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The Powerhouse Of The Cell Mitochondria is commonly called as power house of the cell. They provide energy transuding system. This system is used to change the food into chemical energy by oxidative phosphorylation. ATP is synthesized during oxidative phosphorylation. Discovery: Mitochondria was first described by Altmann in 1894. He named them as bioblast. He predicted that bioblast had some ...

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The Cell Wall And Its Structure

­The Cell Wall Cell wall is a characteristic of a plant cell and it distinguishes it from the animal cell. The cell wall is considered as an Ergastic Substance, i.e., secreted by the living substance (protoplasm) but it-self is non-living. The synthesis of cell wall is controlled by Golgi complex. Three layers of cell wall can be distinguished: Middle Lamella: ...

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