CALVIN CYCLE – CARBON DIOXIDE FIXATION:-
Carbon Dioxide Fixation:-
-It’s the process where inorganic CO₂ is converted into organic compounds.
-This process is the foundation of autotrophic metabolism (organisms that make their own
food).
- Example: Plants and many microbes use sunlight to fix CO₂ into sugars.
Inorganic → Organic carbon = CO₂ fixation
Calvin Cycle
-A cyclic metabolic pathway used by autotrophs (like plants, cyanobacteria) to fix CO₂.
-Produces Glyceraldehyde-3-phosphate (G3P) – a 3-carbon sugar.
- Also called: C₃ Pathway (since 3-phosphoglycerate is the first stable compound)
Overall Reaction:
3 CO₂ + 9 ATP + 6 NADPH → G3P + 9 ADP + 6 NADP⁺ + 8 Pi
It requires:
Energy (ATP)
Reducing power (NADPH)
Carbon Dioxide Fixation:-
-It’s the process where inorganic CO₂ is converted into organic compounds.
-This process is the foundation of autotrophic metabolism (organisms that make their own
food).
- Example: Plants and many microbes use sunlight to fix CO₂ into sugars.
Inorganic → Organic carbon = CO₂ fixation
Calvin Cycle
-A cyclic metabolic pathway used by autotrophs (like plants, cyanobacteria) to fix CO₂.
-Produces Glyceraldehyde-3-phosphate (G3P) – a 3-carbon sugar.
- Also called: C₃ Pathway (since 3-phosphoglycerate is the first stable compound)
Overall Reaction:
3 CO₂ + 9 ATP + 6 NADPH → G3P + 9 ADP + 6 NADP⁺ + 8 Pi
It requires:
Energy (ATP)
Reducing power (NADPH)
