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Cells require energy and this energy is synthesised by the mitochondria in the form of ATP .ATP is the main energy source for the majority of cellular functions. This includes the synthesis of macromolecules, including DNA and RNA and proteins . ATP also plays a critical role in the transport of macromolecules across cell membranes, e.g. exocytosis and endocytosis i hope this helps :D

Arfah Naseem

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13y ago

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