Which of the following statements best explains the ability of C4 plants to perform photosynthesis with no apparent photorespiration? A) They do not participate in the Calvin cycle. B) They use PEP carboxylase to initially fix CO₂. C) They conserve water more efficiently. D) They exclude oxygen from their tissues.

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Quizplus · Accepted Answer

C4 plants use PEP carboxylase to initially fix CO2, which has a higher affinity for CO2 and does not fix oxygen, thus reducing photorespiration. This enzyme allows them to capture very low levels of CO2 and effectively perform photosynthesis even under conditions where photorespiration would normally occur in other plants.

Which of the Following Statements Best Explains the Ability of C4