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Present CO2 concentration in atmosphere is limiting for:

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By Expert Faculty of Sri Chaitanya
a
Maize
b
Sorghum
c
Tomato
d
Sugarcane

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detailed solution

Correct option is C

C4 plants show saturation at about 360 µlL-1 while C3 responds to increased CO2 concentration and saturation is seen only beyond 450 µlL-1. Thus, current availability of CO2 levels is limiting to the C3  plants. Maize, sorghum and sugarcane are C4 plants while tomato is a C3 plant.


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Statement A: The optimum CO2 concentration for photosynthesis in C4 plants is lower than C3 plants.

Statement B: The optimum CO2 concentration for Rubisco activity for carboxylation is lower than that to PEP carboxylase activity.

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