ATP

A molecule that transfers energy released by respiration to processes within a cell.

A molecule that stores energy transferred during respiration and supplies it for cellular processes that require energy.

Cellular respiration transfers energy from the breakdown of organic molecules, usually glucose, and supplies ATP for the cell to use. Glucose is a simple sugar that stores chemical energy.

Adenosine triphosphate: a molecule that transfers energy for processes within cells.

For a definition of cellular respiration, include breakdown of glucose, transfer of energy and supply of ATP.

Compare ATP yields per molecule of glucose, rather than simply saying that one process produces ‘more’.

When comparing ATP yields, compare the same amount of glucose. Aerobic respiration produces much more ATP per glucose molecule.

Energy released during respiration is transferred to molecules of ATP. ATP then supplies energy for processes within the cell. Both aerobic and anaerobic respiration make ATP, but they make different amounts from the same quantity of glucose.

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OCR GCSE Combined Science A · J250

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OCR GCSE Combined Science B · J260