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organisms that make their own food
autotroph
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organisms that obtain their energy from the food they eat
heterotroph
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adenosine triphosphate, a high energy molecule that releases energy
ATP
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adenosine diphosphate, the "uncharged" version of ATP
ADP
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the process in which energy in sunlight is used to convert water and carbon dioxide into sugars and oxygen
photosynthesis
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concluded that a plant gets most of its mass from water
van Helmont
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candle in a jar experiment concluded that plants release oxygen
Priestley
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watched aquatic plants bubble and found that plants need sunlight to produce oxygen
Ingenhousz
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Photosynthesis in words
- carbon dioxide + water -> sugar and oxygen
- (the word light over the arrow)
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Photosynthesis in chemical equation
6CO2 + 6H2O -> C6H12O6 + 6O2
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in order to make carbohydrates a plant needs:
- water
- carbon dioxide
- sunlight
- chlorophyll
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a pigment molecule found in chloroplasts that absorbs sunlight energy
chlorophyll
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where gas exchange occurs on the leaf
stomata
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thickened regions of membrane in a chloroplast where photosynthesis takes place
thylakoids
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stacks of thylakoids are called
granum
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the liquid surrounding the thylakoids
stroma
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the light reaction takes place here
thylakoid membrane
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Chlorophyll A is the most important pigment, the rest are called __________ pigments
accessory
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accessory pigments include:
- chlorophyll B - green
- carotenoids - orange and red
- xanthophylls - yellow
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pigments are found in the membrane in groups called...
photosystems
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the "photo" part of photosynthesis, energy is created and stored
light reaction
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the "synthesis" part of photosynthesis. energy is used to make sugars
dark reaction or light independent reaction
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the calvin cycle takes places during this reaction
dark reaction
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this is made as a waste product of the light reaction
oxygen
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these high energy molecules are created during the light reaction
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ETC
electron transport chain
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Photosystem I is also known as __________ because it absorbs this wavelength of light best.
PS 700
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Photosystem II is also known as ______ because it absorbs this wavelength of light best.
PS 680
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reactants for light reaction
-
products of light reaction
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The area where light energy is absorbed and electrons are excited FIRST
Photosystem II
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as electrons move down the ETC, energy is used to create ___-
ATP
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electrons are excited in photosystem II, move to a receptor and the energy used to create this high energy molecule
NADPH
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dark reactions happen here
stroma
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true or false: dark reaction only happens in the dark
false, dark is used in place of light independent
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carbon dioxide is "fixed" into ____-
sugar
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It takes ___ turns of the Calvin cycle to release 1 PGAL
3
-
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the 6C moluecule created when CO2 is added to RuBP quickly converts into 2 ________
PGA molecules (3C each)
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the enzyme that catalyzes the reaction where PGA is created (carboxylation)
rubisco
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PGA is reduced to PGAL with the help of these high energy molecules
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PGAL needs _____ to convert to RuBP
ATP
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product of the dark reaction
sugar
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true or false: the Calvin cycle makes sugar from carbon dioxide
true
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hydrogen ions released when PSII splits water enter the stroma through this
ATP synthase
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energy is created when a hydrogen ion uses this channel to move through the thylakoid membrane
ATP synthase
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What is this?
light reaction of photosynthesis
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what is this?
the dark reaction or light independent reaction
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what is this?
photosynthesis
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