photosynthesis Flashcards
what are the three membranes inside chloroplast and three locations these create
outer membrane
inter membrane space
inner membrane
stroma
thylakoid membrane
thylakoid space
what is done in the stroma, and why is the thylakoid space important
the stroma is where the calven cycle occours
the thylakoid space is where a conc gradient forms for ATP sythase
photosynthesis inputs and outputs
input: light, 6CO2, H2O,
outputs: O2 + glucose ( sugar 2x sugar makes glucose)
what are the two stages to photo synthesis
the light reaction,
light energy -> chemical energy
The calven cycle,
fixation of C
describe the light reaction in photosynthesis
light hits chlorophyll on photosystem 2, it is channeled through chlorophyll to reach the center of the protein. this moves high energy e-
these then move through the cytocrome complex to pump H+ into the thylakoid space. e- lose energy.
these low energy e- enter photosystem 1 which ‘charges the e-‘ back to high energy e- (same process as nb2) these e- are then used to bind NADP+ H+ -> NADPH
to replace the e- H2O is split at photosystem 2 producing H+ O2 + 2e-
the conc grad is used to power ATP synthase to produce ATP
what are the three stages of the calven cycle
fixation
reduction
regeneration
describe the effects of
fixation, reduction and regeneration
fixation, 3 CO2 are added to the system. they are bound with 3x5 carbon molecules, forming 6x3C molecules.
reduction, these are then energyised using NADHA and ATP. 1 3c (sugar) leaves the system.
regeneration, using a little more energy the 5x3c molecules remaining reform into 3x5c molecules used to start the process over again.
when this runs 2x 1 glucose can be made.
what differs between energy producion in animal and plant cells
animal cells use have cellular resperation
they need an external sorce of glucose
plants cells make glucose through photosynthasis then break this down in cellular resperation to create ATP
