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Cambridge IGCSE Biology practice

What is the main product of anaerobic respiration in yeast used for biofuels?

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Biotechnology

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What is the main product of anaerobic respiration in yeast used for biofuels?.

  1. A.Lactic acid
  2. B.Ethanol
  3. C.Glucose
  4. D.Oxygen

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Description

Anaerobic Respiration in Yeast

Yeast cells break down glucose without oxygen to produce ethanol and carbon dioxide. This process releases energy for the yeast and produces ethanol that can be used as a biofuel.

  1. a

    Describe how anaerobic respiration in yeast leads to the production of ethanol used in biofuels.

    Aim for approximately 3 distinct marking points.

    [3]