Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
Photosynthesis equation
|
6CO2+6H2O->C6H12O6+6O2
|
|
|
light reaction
|
converts light energy into chemical energy: ATP and NADPH.
|
|
|
light independent reactions
|
do not use light directly. uses ATP and NADPH and CO2 to make carbs.
|
|
|
photons
|
particles with no mass
|
|
|
light is a form of __________ radiation
|
electromagnetic
|
|
|
when photon mees molecule it either:
|
bounces off, passes, or gets abosorbed.
|
|
|
pigments
|
molecules that absorb wavelength in visible spectrum.
|
|
|
absoprtion spectrum
|
what we see after plotting light absorbed by purified pigment against wavelength
|
|
|
action spectrum
|
plot of biological activity of organism as function of wavelengths of light to which it is exposed.
|
|
|
steps to determining action spectrum.
|
place a plant on a closed container, expose to light of certain wavelength, measure O2 released.repeat.
|
|
|
three photosynthetic pigments used in plants:
|
chlorophyll, carotenoids, phycobilins.
|
|
|
which pigments absorb and drive light reactions?
|
chlorophyll a and cholorophyll b
|
|
|
describe their structure
|
complex ring. magnesium in the middle. long hydrocarbon tail that anchors chlorophyll molecule to protein
|
|
|
what color does chlorophyll absorb?
|
blue and red.
|
|
|
what color does carotenoids absorb?
|
blue anb blue green
|
|
|
what color does phycobilins absorb?
|
yellow-green, yellow, organge.
|
|
|
name three fates for absorbed energy:
|
released as heat/light, rapidly transfered to next pigment molecule, can be used as free energy in chemical rxn.
|
|
|
flourescene
|
process in which energy is given off as heat and light.
|
|
|
what's requirement to pass energy to another pigment molecule?
|
target molecule must be near, must have right orientation, and must be approporaite structure to gain energy.
|
|
|
antenna system
|
In photosynthesis, a group of different molecule that co-operate to absorb light energy and transfer it to reaction center.
|
|
|
photosystem
|
light harvesting complex in chloroplast thylakoid composed of pigments and proteins.
|
|
|
reaction center
|
where received energy from light absorbing pigments and change to chemical energy.
|
|
|
chlorophyll
|
-absorbs light energy and transforms to excited electrons.
-transfers electrons to other molecules and initiates chemical changes. |
|
|
electron transport
|
downhill series of reductions and oxidation. produces NADPH.
|
|
|
noncyclic electron transport
|
produces NADPH and ATP. excited electron lost from chlorophyll so reduced coenzyme happens.
|
|
|
cyclic electron transport
|
produces ATP. the transport process ends up with excited electron returning to chlorophyl after giving up energy to make ATP.
|
