lecture 8 Flashcards
what is the ATP from photosynthesis used for
the dark reactions, the calvin cycle .
where is the light reaction
the thylakoid membrane
where is the calvin cycle
the stroma
after they pass through PS 2 where do electrons go
they go through PS2 to cytochrome complex, which uses their energy for pumping H+ from stroma into the thylakoid space
after going through cytochrome complex, where do the electrons go
go through PS1 where they gain more energy and then reduce NADP+ to NADPH, an electron carrrier, which goes to stroma for carbon fixation.
how does H+ move into and out of thylakoid
moves into thylakoid from the stroma going through the cytochrome complex, then goes from thylakoid space through ATP synthase, back to stroma
what is used in the calvin cycle
9 ATP, 6 NADPH and CO2
what are the three calvin cycle stages
fixation, reduction and regeneration.
describe fixation:
5 carbon molecule (RUBP) + CO2 makes 2 three carbon molecules, called G3P this process doesn’t need energy. This 3 carbon is thus low energy.
describe reduction
the G3P are given energy from 6 ATP and 6 NADPH, making a high energy molecule
describe regeneration:
per 3 turns of the cycle, one G3P is omitted, the other 3 carbon sugars are made back into RUBP with 3 ATP so the cycle can proceed again.
