LDR and LIR overview
- Created by: Emilyburkee
- Created on: 05-02-21 10:49
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- The light dependent reactions
- overview
- occurs in the thylakoids
- produces ATP and NADPH for the calvin cycle
- requires the absorption of light
- excitation and ETC
- Photoionisation
- light energy is absorbed by PS2 and electrons are released
- these electrons assoiate with electron carriers and move down the ETC
- REDOX reactions
- photolyisis
- occurs to replace the electrons lost by PS2
- use of light energy to split a water molecule
- produces H protons and O2
- protons move out - sets up proton gradient
- chemiosmosis
- protons move out of the thylakiod membrane via ATP synthase
- produces ATP from ADP+Pi
- protons move out of the thylakiod membrane via ATP synthase
- chemiosmosis
- protons move out - sets up proton gradient
- Photoionisation
- PS1
- electrons from ECT move to PS1 where they are reexcited by photons
- electron combines with H and joins NADP to reduce it to NADPH
- The light independent reactions
- overview
- uses ATP and NADPH to produce TP
- Carbon fixation
- Co2 is fixed to a mole of RuBP = 6C
- the is unstable so it splits to 2 GP
- Co2 is fixed to a mole of RuBP = 6C
- Reduction
- electrons from NADPH reduce GP using energy from ATP
- Produces TP
- electrons from NADPH reduce GP using energy from ATP
- regeneration
- 1TP leaves the cycle, the other 5 are used to regenerate the 3 moles of RuBP
- Uses rest of ATP
- 1TP leaves the cycle, the other 5 are used to regenerate the 3 moles of RuBP
- overview
- overview
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