ATP

Definition

A molecule that acts as an immediately usable energy store for processes in cells.

Used by OCR

Specification B1.3a, B1.3c · Paper 1 (Foundation), Paper 3 (Higher)

A molecule that acts as a small, immediately usable chemical store of energy in cells.
Cellular respiration is the universal, continuous series of chemical reactions that transfers energy from fuel molecules and supplies ATP. Glucose is a common fuel, although organisms can also use other carbohydrates, lipids and proteins.
Revise: Cellular respiration
A molecule that transfers chemical energy for cellular processes such as active transport, movement and the synthesis of larger molecules.
Revise: Aerobic and anaerobic respiration

1
Do not write that respiration creates or produces energy. State that it transfers energy from fuel molecules and makes that energy available through ATP.
2
“Continuous” does not mean “at a constant rate”. The rate of respiration can change as a cell’s demand for ATP changes.
3
Do not say that anaerobic respiration transfers no energy. It makes ATP, but its ATP yield is much lower than that of aerobic respiration.

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Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

A molecule that stores energy transferred during respiration and supplies it to processes in cells.
Respiration breaks down glucose through a series of reactions and transfers some of the released energy to ATP. Cells use ATP to power activities such as active transport and building molecules. The amount of ATP obtained depends greatly on whether oxygen is available.
Revise: Aerobic vs Anaerobic Respiration
Revise: Continuous Respiration
A molecule that acts as an immediately usable cellular energy store, supplying energy for essential cell processes.
Revise: Mitochondria

1 more note

A molecule made during cellular respiration that transfers energy for processes in cells.
Revise: Exothermic Process