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Yeast cells can respire anaerobically - OCR Gateway - GCSE Biology - Question 17 - 2019 - Paper 3

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Yeast cells can respire anaerobically. (a) Complete the word equation for anaerobic respiration in yeast. glucose ⟶ ........................... + .................... show full transcript

Worked Solution & Example Answer:Yeast cells can respire anaerobically - OCR Gateway - GCSE Biology - Question 17 - 2019 - Paper 3

Step 1

Complete the word equation for anaerobic respiration in yeast.

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Answer

The complete word equation for anaerobic respiration in yeast is:

glucose ⟶ ethanol (or alcohol) + carbon dioxide.

Step 2

Write down two ways in which anaerobic respiration in yeast cells is different from anaerobic respiration in human muscle cells.

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Answer

  1. Yeast produces ethanol and carbon dioxide as end products, whereas human muscle cells produce lactic acid.

  2. Yeast can ferment sugars to produce alcohol, while anaerobic respiration in humans primarily occurs during intense exercise and leads to lactic acid formation.

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