⚡ Show all reasoning — the AI marks against the AQA mark scheme. Partial credit for correct biology even if wording differs.
1 markAerobic equationAQA 8461 style
What are the products of aerobic respiration?
A Glucose and oxygen
B Lactic acid
C Carbon dioxide and water
D Ethanol and carbon dioxide
3 marksAnaerobic respirationAQA 8461 P1 style
A student runs a 400 m race. Describe what happens in their muscle cells to release energy when oxygen supply is insufficient, and explain what causes the "burning" sensation in the muscles. (3 marks)
Hint: Name the process, name the product, explain the consequence.
+30 XP
3 marksOxygen debtAQA 8461 style
After a sprint race, an athlete continues to breathe heavily for several minutes. Explain why, in terms of oxygen debt. (3 marks)
Hint: Link to: what was produced during the sprint, what needs to happen to it, why extra O₂ is needed.
+30 XP
4 marksFermentation applicationAQA 8461 style
Yeast is used to make bread. Explain how the metabolic process occurring in the yeast causes the bread to rise. Include the word equation for the relevant reaction. (4 marks)
Hint: Name the type of respiration, write the word equation, and explain how the gas produced causes rising.
+40 XP
1 markComparing respiration typesAQA 8461 style
Which statement correctly compares aerobic and anaerobic respiration in muscle cells?
A Both produce the same amount of energy per glucose molecule
B Aerobic respiration releases more energy and requires oxygen; anaerobic releases less energy and produces lactic acid