Which of the following CORRECTLY describes the role of rubisco in the Calvin cycle? A)Rubisco uses NADPH to reduce 3-phosphoglycerate to a three-carbon sugar. B)Rubisco incorporates CO₂ from the atmosphere into an organic molecule. C)Rubisco uses ATP to regenerate RUBP. D)None of the other answer options is correct.

Question

Quizplus · Accepted Answer

Rubisco plays a crucial role in the Calvin cycle by catalyzing the binding of atmospheric carbon dioxide (CO2) with the five-carbon sugar ribulose-1,5-bisphosphate (RuBP) to form two molecules of a three-carbon compound, 3-phosphoglycerate (3-PGA). This is the first step in carbon fixation, which ultimately results in the production of organic molecules like carbohydrates. Therefore, option B is the correct answer as it describes the role of Rubisco in incorporating CO2 from the atmosphere into an organic molecule. Option A describes the role of NADPH in the Calvin cycle, while option C describes the role of ATP in regenerating RuBP.

Which of the Following CORRECTLY Describes the Role of Rubisco