Printable worksheet ยท 2 of 4
Without oxygen, the products can differ - Paper 2
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Anaerobic model: yeast. Human muscle produces lactate (often called lactic acid in word summaries); yeast fermentation produces ethanol and carbon dioxide. Neither stated process uses oxygen as a reactant, and each transfers less energy per glucose than aerobic respiration. Claim to assess: 'Less energy per glucose means no energy can be transferred.' Paper exercise only; do not perform fermentation experiments.
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- Name the stated products for yeast, and explain why 'lactate' is not the appropriate answer on this card.
- Evaluate this claim: 'Less energy per glucose means no energy can be transferred.'
- For this yeast model, distinguish 'without oxygen as a reactant' from 'without energy transfer'.
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