Light Independant Reaction
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28 Terms
Where does the light independent reaction occur?
In the stroma of the chloroplast
What are the reactants of the light independent reaction?
Carbon dioxide ATP and reduced NADP
What are the products of the light independent reaction?
Glucose and other organic molecules
What are the three stages of the Calvin cycle?
Carbon fixation reduction and regeneration
What is carbon fixation?
The incorporation of carbon dioxide into an organic compound
What happens during carbon fixation?
CO2 reacts with RuBP to form an unstable 6C compound
What happens to the unstable 6C compound?
It splits into two 3C GP molecules
What enzyme catalyses carbon fixation?
Rubisco
What does RuBP stand for?
Ribulose bisphosphate
What is the carbon number of RuBP?
5C
What is GP?
Glycerate 3 phosphate
What is the carbon number of GP?
3C
What happens during reduction?
GP is converted into triose phosphate
What provides energy for the reduction of GP?
ATP
What provides protons and electrons for the reduction of GP?
Reduced NADP
What happens to reduced NADP during reduction?
It is oxidised to NADP
Where does the regenerated NADP go?
Back to the light dependent reaction
What happens during regeneration?
Most TP is used to regenerate RuBP
What provides energy for regeneration of RuBP?
ATP
What happens to the remaining TP?
It is used to make other organic molecules
How many turns of the Calvin cycle produce one glucose molecule?
Six turns
Why are six turns of the Calvin cycle needed for one glucose?
Six carbon atoms are needed to form glucose
What is TP?
Triose phosphate
What can TP be used to produce?
Sugars carbohydrates amino acids lipids and nucleotides
What simple sugar can TP produce?
Glucose
What larger carbohydrates can TP produce?
Starch sucrose and cellulose
What other organic molecules can TP produce?
Amino acids lipids and nucleotides
What happens to the carbon in each turn of the Calvin cycle?
Five carbons regenerate RuBP and one carbon is available for organic compounds