TREE PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Glycerate 3-phosphate is carboxylated using carbon dioxide.
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Two glycerate 3-phosphates are linked together to form one hexose phosphate.
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Glycerate 3-phosphate is reduced to triose phosphate.
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Five glycerate 3-phosphates are converted to three ribulose 5-phosphates.
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Detailed explanation-1: -The light independent reactions are collectively known as the Calvin cycle and involve three main steps: Carboxylation of ribulose bisphosphate . Reduction of glycerate-3-phosphate. Regeneration of ribulose bisphosphate.
Detailed explanation-2: -Glycerate 3-phosphate (GP) is converted into triose phosphate (TP) using reduced NADP and ATP. The reduced NADP provides the reducing power (hydrogen) and is converted back to NADP which is then reduced again in the light-dependent reactions. ATP is also used to provide energy for the conversion.
Detailed explanation-3: -This part of the light-independent reactions is referred to as carbon fixation. Then, the energy carriers from the light-dependent reactions make their contribution. ATP and NADPH give each 3-phosphoglycerate a hydrogen atom, creating two molecules of the simple sugar G3P (glyceraldehyde-3-phosphate).
Detailed explanation-4: -The light-independent reactions (also known as the Calvin cycle) can be organized into three basic stages: fixation, reduction, and regeneration (Video 13.6. 1).
Detailed explanation-5: -It is produced from glucose during glycolysis.