The value of R.Q at compensation point is A Unity B Infinity C > 1 D Zero please explain this

Dear Student ,
Please find below the solution to the asked query:

The correct option is D.
Compensation point refers to the intensity of light at which rate of respiration is equal to the rate of photosynthesis in plants.  It usually occurs during early morning and late evening in low sunlight. At this point of light intensity, the amount of CO2 taken up in photosynthesis is equal to the amount of CO2 released by respiration. Also the amount of O2 taken up for respiration is equal to the amount of O2 released by photosynthesis.Since the net value of carbon dioxide and oxygen produced or assimilated is zero at compensation point in plants. The RQ also becomes zero because
RQ = CO2 produced / O2 consumed
RQ = 0/0 = 0

Hope this information will clear your doubts about the value of R.Q at compensation point.
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