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Mitochondria - Mitochondria is another organelle of the...

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Mitochondria : is another organelle of the cell. It is called the "power house of the cell" because it stores and releases the energy of the cell. The energy released is used to form ATP (adenosine triphosphate). Figure 3.3 A cross-section of a Mitochondrion Nucleus : Prokaryotic cells don’t have a nucleus but eukaryotic cells have a nucleus situated in the cytoplasm. The nucleus mainly contains DNA ( i.e., Deoxyribonucleic acid). DNA is organized into linear units called chromatin. Genes are the functional segments within the chromosome. Each chromosome consists of approximately 1,000,000 genes. The chromatin is coiled around nuclear protiens called histones. When chromatin is coiled, it forms chromasomes . Genes contain the coding for all the protiens in a cell of an animal or plant. The nucleus of the cell is surrounded by an outer membrane called the nuclear envelope . The nuclear membrane resembles the plasma membrane in its function. It is also a double layer membrane consisting of two lipid layers similar to those in the plasma membrane. Pores in the membrane
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