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Respiratory quotient (R.Q.) is defined as the ratio of:
AVolume of O2 consumed to volume of CO2 liberated
BMass of glucose used to mass of ATP made
CVolume of CO2 liberated to volume of O2 consumed
DVolume of water formed to volume of CO2 made
Answer & Solution
Correct answer: C. Volume of CO2 liberated to volume of O2 consumed
1. Respiratory quotient measures gases exchanged during respiration.
2. It is the ratio of the volume of CO2 liberated to the volume of O2 consumed.
3. So option B gives the correct order.
4. Option A inverts the ratio, which would give the wrong value, so it is the trap.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 12 Plant Anatomy and Plant Physiology "Respiratory quotient", p.191_
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