4. When the rate of photosynthesis is just sufficient to meet the requirements of respiration, it is called
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Answers
The (light) compensation point is the light intensity on the light curve where the rate of photosynthesis exactly matches the rate of cellular respiration. At this point, the uptake of CO2 through photosynthetic pathways is equal to the respiratory release of carbon dioxide, and the uptake of O2 by respiration is equal to the photosynthetic release of oxygen. RuBP decreases the photosynthetic activity and therefore affects gamma. The intracellular concentration of CO2 affects the rates of photosynthesis and photorespiration. Higher CO2 concentrations favour photosynthesis whereas low CO2 concentrations favor photorespiration.
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When the photosynthesis rate is sufficient to meet the requirements of respiration, it is called compensation point.
EXPLANATION:
In plants, compensation point is attained when the "rate of photosynthesis" is equal to the "rate of respiration".
The photosynthesis is a condition when plants prepare their food. Respiration is the condition when plant takes oxygen and releases carbon dioxide in the atmosphere.
At, a particular period of time these two rates are equal. The photosynthetic activity gets decreased due to the action of RuBP released. The carbon dioxide presence determines the photosynthesis rate and respiration of the plants.