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Photosynthesis
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organisms that make their own food
autotroph
organisms that obtain their energy from the food they eat
heterotroph
adenosine triphosphate, a high energy molecule that releases energy
ATP
adenosine diphosphate, the "uncharged" version of ATP
ADP
the process in which energy in sunlight is used to convert water and carbon dioxide into sugars and oxygen
photosynthesis
concluded that a plant gets most of its mass from water
van Helmont
candle in a jar experiment concluded that plants release oxygen
Priestley
watched aquatic plants bubble and found that plants need sunlight to produce oxygen
Ingenhousz
Photosynthesis in words
carbon dioxide + water -> sugar and oxygen
(the word light over the arrow)
Photosynthesis in chemical equation
6CO
2
+ 6H
2
O -> C
6
H
12
O
6
+ 6O
2
in order to make carbohydrates a plant needs:
water
carbon dioxide
sunlight
chlorophyll
a pigment molecule found in chloroplasts that absorbs sunlight energy
chlorophyll
where gas exchange occurs on the leaf
stomata
thickened regions of membrane in a chloroplast where photosynthesis takes place
thylakoids
stacks of thylakoids are called
granum
the liquid surrounding the thylakoids
stroma
the light reaction takes place here
thylakoid membrane
Chlorophyll A is the most important pigment, the rest are called __________ pigments
accessory
accessory pigments include:
chlorophyll B - green
carotenoids - orange and red
xanthophylls - yellow
pigments are found in the membrane in groups called...
photosystems
the "photo" part of photosynthesis, energy is created and stored
light reaction
the "synthesis" part of photosynthesis. energy is used to make sugars
dark reaction or light independent reaction
the calvin cycle takes places during this reaction
dark reaction
this is made as a waste product of the light reaction
oxygen
these high energy molecules are created during the light reaction
ATP
NADPH
ETC
electron transport chain
Photosystem I is also known as __________ because it absorbs this wavelength of light best.
PS 700
Photosystem II is also known as ______ because it absorbs this wavelength of light best.
PS 680
reactants for light reaction
water
uses sunlight
products of light reaction
ATP
NADPH
The area where light energy is absorbed and electrons are excited FIRST
Photosystem II
as electrons move down the ETC, energy is used to create ___-
ATP
electrons are excited in photosystem II, move to a receptor and the energy used to create this high energy molecule
NADPH
dark reactions happen here
stroma
true or false: dark reaction only happens in the dark
True
False
false, dark is used in place of light independent
carbon dioxide is "fixed" into ____-
sugar
It takes ___ turns of the Calvin cycle to release 1 PGAL
3
___ PGAL = 1 Glucose
2
the 6C moluecule created when CO2 is added to RuBP quickly converts into 2 ________
PGA molecules (3C each)
the enzyme that catalyzes the reaction where PGA is created (carboxylation)
rubisco
PGA is reduced to PGAL with the help of these high energy molecules
ATP
NADPH
PGAL needs _____ to convert to RuBP
ATP
product of the dark reaction
sugar
true or false: the Calvin cycle makes sugar from carbon dioxide
True
False
true
hydrogen ions released when PSII splits water enter the stroma through this
ATP synthase
energy is created when a hydrogen ion uses this channel to move through the thylakoid membrane
ATP synthase
What is this?
light reaction of photosynthesis
what is this?
the dark reaction or light independent reaction
what is this?
photosynthesis
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Author
MrsG
ID
71163
Card Set
Photosynthesis
Description
unit 2 saucon valley
Updated
2011-03-07T02:25:00Z
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