PHOTOSYNTHESIS
THE CALVIN CYCLE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
1
|
|
|
3
|
|
|
2
|
|
|
6
|
Detailed explanation-1: -A G3P molecule contains three fixed carbon atoms, so it takes two G3Ps to build a six-carbon glucose molecule.
Detailed explanation-2: -The carbohydrate products of the Calvin cycle are three-carbon sugar phosphate molecules, or “triose phosphates", namely, glyceraldehyde-3-phosphate (G3P).
Detailed explanation-3: -3-PGA is a three carbon compound.
Detailed explanation-4: -One molecule of carbon is fixed at each turn of the Calvin cycle. One molecule of glyceraldehyde-3 phosphate is created in three turns of the Calvin cycle. Two molecules of glyceraldehyde-3 phosphate combine together to form one glucose molecule.
Detailed explanation-5: -This reaction is catalyzed by the enzyme ribulose biosphosphate carboxylase/oxidase (RUBISCO). Twelve molecules of 3-Phosphoglycerate (3PG) are the products of this reaction. Energy from ATP and NADPH reduce the 3PG molecules to form another 3 carbon compound, glyceraldehyde-3-phosphate (G3P).