Several reactions are endergonic and though thermodynamically forbidden may be made to proceed by coupling them with suitable exergonic reactions. For e.g., the conversion of ATP to ADP is highly exergonic and can drive any thermodynamically forbidden reaction in the desired direction.
The Cell
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The cell is the fundamental structural and functional unit of living organisms. Cells need energy for active transport, to move molecules between the environment and the cells across cells or within cells. Cells obtain energy by oxidation of molecules like glucose. This oxidation takes place in a complex and controlled way by means of enzymes which are biocatalysts.
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