photosynthesis and respiration Flashcards
Chemiosmosis definition
movement of H+ down the electrochemical gradient, Wich drives ATP production in photosynthesis and respiration.
in photosynthesis, ATP produced in ……..
and used in……..
Light dependent stage
Light independent stage
chemiosmosis in Photosynthesis vs Respiration
Where high energy e come from?
Electron transport chain location?
ATP production name?
Light absorbed by chlorophyll
Released from chemical bonds in glucose
Thylakoid membranes in chloroplast
Inner mitochondrial membranes
Photophosphorylation
Oxidative phosphorylation
in which organelle the 2 stages of photosynthesis occur?
cytoplasm
what is granum?
Which photosynthesis stage takes place inside grana?
stacks of thylakoids
light dependent
what is stroma?
Which photosynthesis stage takes place inside stroma?
fluid-filled matrix
light independent
purpose of chloroplast adaptations:
stacked thylakoid membranes
photosynthetic pigments are organised into photosystems
grana surrounded by stroma
chloroplasts have their own DNA and ribosomes
inner chloroplast membrane embedded with transport proteins and less permeable than outer membrane
large s.a for ld reactions
maximised light absorption efficiency
products of ld pass directly to the enzymes catalysing lid reactions
photosynthetic proteins can be produced inside rather than imported
control which substance enter the stroma from cell cytoplasm
key words of photosynthetic pigments
photosystems
Accessory pigments
Chlorophyll a
electrons
photosystems?
light-harvesting complexes of pigments found in thylakoid memb.
Accessory pigments
chlorophyll b
carotenoids
xanthophylls
absorb light photons and funnel the energy to reaction centre at the heart of cytoplasm to chlorophyll a
what is photolysis
splitting of water by light energy
uses of triose phosphate TP
.regenerate RuBP
.converted into 6 carbons (glucose or fructose) which can react to produce disaccharides
.glucose can react to form polysaccharides
.single TP to glycerol
.TP act as starting point for a.a synthesis
what is a limiting factor?
name 3
a factor that limits the rate of a particular process.
[CO2]
light intensity
temperature
How
[CO2]
light intensity
temperature
affect photosynthetic rate?
low CO2 slow GP formation rate
Rate at which ATP produced during LI stage
low temp. limit kinetic energy, high temp. denature enzymes eg. RuBisCo
