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C1.3 HL Light Independent Reactions
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Total cards: 9•Content version: v3•Public deck•Updated: 8/1/2026
Card preview (9)
#1
Front (Question)
Where does the Calvin cycle occur?
Back (Answer)
Stroma.
#2
Front (Question)
What enzyme fixes CO₂?
Back (Answer)
Rubisco.
#3
Front (Question)
What is carbon fixation?
Back (Answer)
CO₂ + RuBP → unstable 6C → two 3-PGA.
#4
Front (Question)
What happens in the reduction phase?
Back (Answer)
ATP + NADPH reduce 3-PGA → TP.
#5
Front (Question)
What happens in regeneration?
Back (Answer)
TP regenerates RuBP using ATP.
#6
Front (Question)
Why do 6 turns of the cycle produce one glucose?
Back (Answer)
Each turn fixes 1 CO₂ → 6 CO₂ needed to make enough TP.
#7
Front (Question)
Why is rubisco inefficient?
Back (Answer)
It can bind O₂ → photorespiration (wastes energy).
#8
Front (Question)
Why does Calvin cycle stop without light?
Back (Answer)
ATP and NADPH supply stops.
#9
Front (Question)
Why is TP important?
Back (Answer)
It is the building block for glucose, lipids, and amino acids.