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Photosynthesis

CAPP Unit 6B

TermDefinition
C4 plants a plant adaptation for hot and sunny environments, allows CO2 to be captured with stomata closed to prevent water loss
NADPH one of a class of molecules that carries high energy elections between reactions
light part of the electromagnetic spectrum that can be perceived by the human eye
stomata pores in a plant leaf where water transpires
stroma the fluid inside chloroplasts
thylakoid (membrane) membranous sacs found inside the chloroplasts where the light-dependent reactions of photosynthesis occur
reaction center specific pigment molecules where absorption of light occurs - in plants these are called photosystem II and photosystem I
chlorophyll the green pigment in plants - it is the main light absorbing pigment in most plants
redox reaction a paired set of oxidation and reduction reactions
oxidation a reaction where electrons are lost (OIL)
reduction a reaction where electrons are gained (RIG)
pigments any molecule that absorbs some colors of light while reflecting other colors of light
photosynthesis the reaction that uses energy captured in photons of light to charge ADP to ATP, and then store excess energy in glucose, and eventually starch
photon a "packet" of light
wavelength a measure of the distance between two identical points on a wave. Chlorophyll absorbs some wavelengths of light (blue and red) better than others (green)
Calvin cycle A series or reactions that stores the energy in ATP for long term - in the form of glucose.
chloroplast The organelle in plant and algae cells where photosynthesis takes place.
grana A stack of thylakoids.
photosystem a protein-pigment complex in chloroplasts that captures light energy and converts it to chemical energy during photosynthesis
mesophyll the inner tissue of a leaf that contains many chloroplasts
CAM plant an adaptation of plants that live in hot dry environments where the stomata open at night and take in CO2 to store for the hot parts of the day, limiting water loss during the hottest parts of the day
 



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