Non-cyclic phosphorylation Flashcards
What are the two stages of photosynthesis ?
light dependent stage
light independent stage
What is formed in light dependent stage ?
energy from sunlight is absorbed to form ATP
In the light dependent stage what is hydrogen from water used for ?
reduce NADP to reduced NADP
How is organic molecules such as glucose formed in the light independent stage ?
hydrogen from reduced NADP reacts with carbon-dioxide
How many photosystems are involved in non-cyclic photophosporylation ?
2
What wavelength of light does PSI absorb ?
700 nm
What wavelength of light does PSII absorb ?
680 nm
What is released from reaction centre of PSII when light is absorbed ?
excited electrons
Where are the excited electrons passed to ?
electron transport chain
How is ATP produced ?
chemiosmosis
How is the electrons lost from PSII replaced ?
water molecules broken down by energy from sun
After PSII , What is released from PSI ?
excited electrons
Where is the excited electrons from PSI passed to ?
electron transport chain
How is electron lost from PSI replaced ?
electrons that travelled from PSII that travelled along electron transport chain
Which electrons are accepted ?
electrons leaving electron transport chain from PSI
What is the coenzyme that accept electrons and hydrogen ions ?
NADP which becomes reduced NADP
What does the reduced NADP provide ?
hydrogen or reducing power to form organic molecules
What is photolysis ?
process where water is split into electrons , H+ and oxygen molecules using energy from the sun
What do electrons released from splitting of water molecules replace ?
electrons lost from PSII
What catalyses the breakdown of water molecules ?
oxygen-evolving complex
What is released as by product when water is split ?
oxygen
Where are the protons released to ?
lumens of thylakoids
What happens when there’s more protons in the lumen of thylakoids ?
proton concentration increases
How is reduced NADP formed ?
H+ and electron from PSI combine with NADP
What is the energy released when electrons pass through electron carriers used for ?
pump H+ ions ( protons ) into the lumen of thylakoids
How does the protons leave the lumen of thylakoids ?
facilitated diffusion through hydrophilic channel
