The quantum yield of photosynthetic carbon fixation in a C3 Plant and C4 plant is studied as a function of leaf temperature. Following are some statements based on this study.A. At low temperature the quantum yield of C3 plant is lower than C4 plant.B. In C4 plant quantum yield does not show a temperature dependence.C. Since the photorespiration is low in C4 plants because of CO2 concentrating mechanism, quantum yield is not affected.D. At higher temperature the quantum yield of C3 plant is lower than C4 plant.Which one of the following combination of above statements is correct?

C 4 PHOTOSYNTHESIS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	A, B and D
B	B, C and D
C	A, B and C
D	A, C and D

Explanation:

Detailed explanation-1: -The C3 plants survive at a lower temperature conditions, while C4 plants survive at a higher range of temperatures. C3 plant requires an optimum temperature of 18oC−24oC . C4 plant requires an optimum temperature of 32oC−55oC .

Detailed explanation-2: -C3 plants generally had a greater ability for temperature acclimation of photosynthesis across a broad temperature range, CAM plants acclimated day and night photosynthetic process differentially to temperature, and C4 plants was adapted to warm environments.

Detailed explanation-3: -Quantum yield of photosynthesis is carbohydrate or dry mass, formed by plant using carbon dioxide from air. It is about 12% in C3 plants.

Detailed explanation-4: -Therefore, CAM plants can perform net CO2 fixation 15% more efficiently than C3, plants, although 10% less efficiently than C4 plants.

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