• ATP is a small soluble nucleotide and universal energy currency
• It links energy-yielding respiration to energy-requiring cellular processes
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Start with the concept explanation, then practise to create mastery evidence.
2
Learning objective
C1.2.2—Life processes using ATP
New
• ATP supplies active transport, anabolic synthesis, and movement
• Examples include membrane pumps, macromolecule synthesis, and chromosome movement
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Start with the concept explanation, then practise to create mastery evidence.
3
Learning objective
C1.2.3—ATP ↔ ADP interconversions
New
• ATP hydrolysis to ADP and phosphate releases energy for coupled reactions
• Respiration phosphorylates ADP to ATP; ATP is recycled rather than stored
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Start with the concept explanation, then practise to create mastery evidence.
4
Learning objective
C1.2.4—Cell respiration system
New
• Cell respiration is enzyme-controlled release of energy from organic compounds
• Carbon compounds are oxidized stepwise so energy can be transferred to ATP
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Start with the concept explanation, then practise to create mastery evidence.
5
Learning objective
C1.2.5—Anaerobic vs. aerobic respiration in humans
New
• Aerobic respiration uses oxygen and mitochondria, producing CO₂, water, and high ATP
• Anaerobic respiration in human cytoplasm produces lactate and low ATP
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Start with the concept explanation, then practise to create mastery evidence.
6
Learning objective
C1.2.6—Variables affecting rate
New
• Rate depends on metabolic demand, organism size, oxygen, substrate, temperature, and pH
• Respirometers measure oxygen uptake while soda lime absorbs CO₂
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Mastery
0
Attempts
0
Mistakes
Start with the concept explanation, then practise to create mastery evidence.