Light INdependent reactions

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9 Terms

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Light independent reaction

Hydrogen ions from water join CO2 molecules to make glucose

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where does it happen?

in stroma, after the light dependent reactions

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what does light independent reactions need?

ATP and NADPH from light dependent reactions

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1) Carbon Fixation

CO₂ attaches to RuBP (5-carbon) → forms an unstable 6-carbon molecule

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2) Reduction Phase?

PGA is activated by ATP and reduced by NADPH → forms PGAL (G3P).

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RuBP

ribulose biphosphate

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role of PGAL?

forms glucose, regenerates RuBP and acts as energy for carbon fixation 

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3) RuBP regenerated 

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Why does 2 PGAL molecules leave the chloroplasts during reduction?

used to make one glucose molecule