Question

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

Answer 1

Compensation point refers to the intensity of light at which rate of respiration is equal to the rate of photosynthesis in plants. The occurrence time is usually early morning and late evening in low sunlight.  

The amount of CO2 taken up in the photosynthesis is equal to the amount of CO2 released by respiration. 

The amount of O2 taken up for respiration is equal to the amount of O2 released by photosynthesis. 

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

Option D is the correct answer.