The light independent stage is called the calvin cycle
the light independent reaction happens in the Stroma, it is a series of reduction reactions
the calvin cycle continues until the NADPH, ATP or CO2 is used up.
the molecules involved:
Ribulose bisphosphate (5C)
carbon dioxide (1C)
glycerate 3 phosphate (3C)
triose phosphate (3C)
enzyme = RuBisCo
aim of the light independent stage is to reduce CO2 to glucose
the substances needed for the Light independent stage:
NADPH , ATP, CO2 , Ribulose Bisphosphate (RuBP), RuBisCo
The substances produced:
NADP , ADP , Pi, glucose
Carbon dioxide (1C) is added to ribulose bisphosphate (5C) catalysed by the enzyme RuBisCo.
A highly unstable 6C molecule is produced which immediately splits into two glycerate-3-phosphate (3C)
the two glycerate-3-phosphate molecules are reduced to produce two triose phosphate molecules.
to allow this reduction reaction NADPH is oxidised and ATP is hydrolysed
the two triose phosphate molecules are used to make glucose and resynthesise Ribulose bisphosphate. the resynthesis of Ribulose bisphosphate requires the hydrolysis of ATP.
five out of six turns of the Calvin cycle resynthesise Ribulose bisphosphate.
one out of six turns of the Calvin cycle form glucose