High School

Which statement correctly describes carbon fixation?

A. The conversion of CO₂ into an organic compound
B. The use of RuBisCO to form 3-PGA
C. The formation of RuBP from G3P molecules
D. The production of carbohydrate molecules from G3P
E. The use of ATP and NADPH to reduce CO₂

Answer :

Final answer:

Carbon fixation is the conversion of CO2 into an organic compound, such as glucose. This process occurs in the Calvin cycle, where RuBisCO catalyzes the reaction between CO2 and RuBP, forming 3-PGA. The 3-PGA is then used to produce carbohydrates through reduction and regeneration reactions.

Explanation:

Carbon fixation is the process by which CO2 is converted into an organic compound. It occurs in the Calvin cycle, where the enzyme RuBisCO catalyzes the reaction between CO2 and ribulose bisphosphate (RuBP), forming 3-phosphoglycerate (3-PGA). The 3-PGA molecules are then used to produce carbohydrate molecules, such as glucose, through a series of reduction and regeneration reactions.

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