photosynthesis Flashcards
particle photon
smallst unit of lightehich osscilate on wavelengths
the visible light in the electromagnetic spectrum
380-750n
shortest wavelength
380n purple
longest wavelength
750n red
most effectively absorbed wavelengths
blue (500n) red (700n)
pigments found in chloroplast
chlorophyll (green)
cartenoid (orange)
xantophyll (orange)
anthocynins (red)
equation for photosynthesis
6CO2+ 6H2O—-> C6 H12 O6 + 6O2
two stages of photosynthesis
1) light dependant reaction
2) calvin cycle
light dependant reaction (simple)
happens in the thylakoid membrane of chloroplast, requires sunlight and basically light energy is captured and tranformed into atp
calvin cycle (simple)
happens in the stroma, does not require sunlight atp is used to create sugars (glucose) the plant will live and grow on
thylakoids
disk like structure inside chloroplast that help absorb light, they contain chlorophyll and are bound to the chloroplast membrane
grana
stacks of thylakoids inside chloroplasts
stroma
fluid filled space surrounding the grana
pigment
chemical molecules that absorb visible light
green is reflected
red and blue are easily absorbed
light dependant reactions (mc)
- photons of light get absorbed by chlorophyll in the thylakoids
2.electrons which are in the pigment get excited and used to produce atp
3.the displaced electrons are replaced by photolysis
photolysis
process of splitting water (by sunlight) to produce atp electrons protons NADPH
calvin cycle
light independant reaction
atp from light dependant reaction and CO2 are used to produce glucose
what do light dependant reactions use light for
light dependant reactions use light energy to make two molecules needed for the next stage of photosynthesis: ATP and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts
equation for photolysis
H2O—>2H + 1/2O2
chromatography
separating and identifying pigments
rf
so like the distance moved by substance devided by the distance moved by solvent and you use it for identifying pigments