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AQA · GCSE · Combined Science · Higher

Air holes in a culture-bottle cap

Q04.4 1 mark

Describe why there are air holes in the cap of the culture bottle.

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  1. 1 Explain that air/oxygen is needed so bacteria can respire aerobically, or that carbon dioxide can escape.

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The air holes allow oxygen in so the bacteria can respire aerobically.

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