Energy for maintenance processes is obtained from external sources through the process of nutrition, where organisms consume food to extract energy-rich molecules that can be used for cellular activities.
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Energy for maintenance processes is obtained from external sources through the process of nutrition, where organisms consume food to extract energy-rich molecules that can be used for cellular activities.
Living organisms obtain energy for maintenance processes primarily through cellular respiration. In this metabolic pathway, glucose and other organic molecules obtained from food undergo a series of biochemical reactions, ultimately producing adenosine triphosphate (ATP). ATP serves as the primary energy currency within cells, powering various maintenance processes like DNA repair, protein synthesis, and cellular turnover. The energy released during cellular respiration is derived from the breakdown of chemical bonds in organic molecules. Additionally, some organisms, like plants and certain bacteria, capture and convert sunlight into chemical energy through photosynthesis, providing an alternative source of energy for maintenance functions.