Which of the following statements concerning crassulacean acid metabolism (CAM)is TRUE? A)It allows desert plants to collect CO₂ at night for use during the day in the Calvin cycle. B)Desert plants utilize CAM to transport CO₂ to bundle sheath cells where the Calvin cycle takes place. C)It permanently fixes CO₂ in place of RuBisCo,avoiding the oxygenase reaction. D)CAM facilitates transport of photorespiration products back to the Calvin cycle. E)All of the above are true.

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Quizplus · Accepted Answer

CAM allows desert plants to collect CO2 at night when transpiration rates are low and store it as an organic acid. During the day, the stomata close, preventing water loss, and the organic acid is broken down to release CO2 which is used in the Calvin cycle. Additionally, CAM plants also avoid photorespiration by fixing CO2 at night, which is a major advantage in arid environments where water availability is limited.

Which of the Following Statements Concerning Crassulacean Acid Metabolism (CAM)is