PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are used to make glucose.
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They are reshuffled to make CO2 by adding ATP.
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They exit the cycle.
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They are reshuffled to make RuBP by adding ATP.
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Detailed explanation-1: -What happens to the remaining G3P molecules in the last step of the dark reactions? They are used to make glucose. They are reshuffled to make CO2 by adding ATP.
Detailed explanation-2: -The third and final stage of the Calvin cycle is the regeneration of RuBP. Most of the G3P molecules produced in the previous step. More ATP is used to recycle the G3P and produce RuBP that will be used in carbon fixation, allowing the cycle to continue.
Detailed explanation-3: -The remaining G3P molecules stay in the cycle to be formed back into RuBP, which is ready to react with more CO2. Photosynthesis forms a balanced energy cycle with the process of cellular respiration.
Detailed explanation-4: -In the last stage of the Calvin Cycle, RuBP is regenerated, which enables the system to prepare for more CO2 to be fixed.
Detailed explanation-5: -This reaction is catalysed by the enzyme RuBP carboxylase, or rubisco. Reduction: In the second stage of the Calvin cycle, ATP and NADPH molecules are utilised to change the 3-PGA molecules into a sugar molecule containing three carbon atoms called glyceraldehyde-3-phosphate (G3P).