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38 Cards in this Set
- Front
- Back
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autotrophs |
organism that makes its own energy |
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heterotrophs |
consume autotrophs and other heterotrohs; get energy from other organisms |
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decomposers |
least energy; only remnants of nutrients left |
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photosynthesis |
capturing light energy (nuclear fusion) and storing it in chemical bonds |
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chloroplasts |
plant cells |
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stroma |
space inside chloroplast |
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grana |
stacks of thylakoids |
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thylakoids |
membrane discs |
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what do grana do? |
pack large amounts of surface area in little volume |
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what is the rxn for photosynthesis? |
6CO2 + 12H2O + LIGHT > C6H12O6 + 6O2 + 6H2O (CO2+H2O+ LIGHT >CH2O + O2 |
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what is absorption? |
what isn't transmitted |
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what is transmittance? |
what isn't absorbed |
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what are light rxns?` |
rxns that produce O2, take place in thylakoid and use light energy |
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what are dark rxns? |
rxns that produce CH2O; CALVIN CYCLE |
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what do light rxns do? |
converts NADP+ and ADP to NADPH and ATP |
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what happens to water during light rxns? |
it is split to get O2 |
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what is CO2 reduced to in photosynthesis? |
carbohydrate |
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where does the calvin cycle take place? |
in the stroma |
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what does the calvin cycle do? |
oxidzes NADPH and ATP to form NADP+ and ADP + Pi |
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what can light be split into |
wavelengths |
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what do the differences in wavelengths mean? |
shorter= higher energy = blue light longer= lower energy = red light |
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what pigments do plants absorb? |
chlorophyll a and chlorophyll b carotenoids |
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what colours do plants do more photo synthesis with? |
blue and red |
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rubsico |
fixes 3CO2 into 3PG |
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how many ATP and NADPH are invested in reduction step of Calvin cycle? |
6ATP and 6 NADPH |
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what is the first carb yielded from photosynthesis? |
G3P |
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photosystem 1 |
absorbs a photon after photosystem 2, and reduces NADP+ to NADPH |
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photosystem 2 |
absorbs photon and produces O2; |
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what is the flow of energy in photosystem 2? |
Pp>cytochrome complex> Pc |
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where do protons only enter? |
the thylakoid |
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what does the calvin cycle start with? |
3RuBP |
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how many times does RuBisco fix CO2 per cycle? |
3 times |
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what happens in the calvin cycle? |
ATP + NADPH + CO2 > ADP+Pi + NADP(+) + CH2O |
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what are cam plants good at? |
being water efficient (separate slight & dark rxns) **don't "breathe" until night |
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what are C4 plants good at? |
being CO2 efficient (separates light & dark rxns) |
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what do C3 plants do? |
regular photosynthesis |
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what is linear electron flow? |
1o pathway that includes both photosynthesis and the creation of ATP & NADPH |
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what is fluorescence? |
absorbing photons of high energy and emitting photons of lower energy |
