PHOTOSYNTHESIS
THE CALVIN CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3 carbon sugars
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3 molecules of RuBP
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4 PGA
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6 ATP
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Detailed explanation-1: -Regeneration. One G3P molecule leaves the cycle and will go towards making glucose, while five G3Ps must be recycled to regenerate the RuBP acceptor. Regeneration involves a complex series of reactions and requires ATP.
Detailed explanation-2: -Stage 3: Regeneration But each turn makes two G3Ps, thus three turns make six G3Ps. One is exported while the remaining five G3P molecules remain in the cycle and are used to regenerate RuBP, which enables the system to prepare for more CO2 to be fixed.
Detailed explanation-3: -Explain why the process of producing glucose in plants is a cycle. Three RuBP molecules get converted to three G3P, and two G3P molecules with the help of three ATPs are converted back to three molecules of RuBP.
Detailed explanation-4: -The remaining G3P molecules regenerate RuBP, which enables the system to prepare for the carbon-fixation step. ATP is also used in the regeneration of RuBP. Figure 5.15 The Calvin cycle has three stages.