International A Level Biology / Cellular respiration
The respiratory quotient (RQ)
Edexcel International A Level Biology (YBI11), chapter 20: Cellular respiration, specification point 7.6. Part of the full course.
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The respiratory quotient (RQ) is the ratio of carbon dioxide produced to oxygen consumed over the same time. It can help you identify the respiratory substrate and recognise when some respiration is anaerobic.