The hydrolysis of ATP can be coupled to energy-requiring reactions within cells
When ATP breaks down, it releases energy. Cells link this release directly to processes that need energy, such as muscle contraction or building proteins.
Real World
Active transport of glucose into intestinal epithelial cells is powered by coupled ATP hydrolysis — without a constant supply of ATP from respiration, absorption of nutrients from food would stop, as seen in conditions disrupting mitochondrial function.
Exam Focus
Use the word 'coupled' explicitly when explaining ATP in energy-requiring reactions — it signals to the examiner you understand direct energy transfer, not just release.
Evaluation Scaffold
A four-step framework for high-quality evaluation. Use this for 'assess', 'evaluate', and 'to what extent' questions.
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