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AP BIOLOGY CHP. 10.2

QUIZ GAME

TermDefinition
Wavelength The distance between the crests of electromagnetic waves
electromagnetic radiation The range of radiation from a kilometer to a nanometer
visible light Between about 380-750 nm in wavelength; the portion of the electromagnetic spectrum detected as various colors by the human eye.
photons Discrete particle of light energy
spectrophotometer An instrument that measures the ablility of a pigment to absorb various wavelengths of light
absorption spectrum A graph plotting a pigments light absorption versus wavelength
chlorphlyll a A type of blue-green accessory photosynthetic pigment that participates directly in light reactions
action spectrum Profiles the relative effectiveness of different wavelenths of radiation in driving the process
chlorophyll b A type of yellow-green accersory photosyntheic pigment that tranbsfers energy to chlorophlyll a.
carotenids Hydrocarbons that are various shades of yellow and orange
photosystem Light capturing stystem located in the thylakoid membrane of the chloroplasts, consisting of a reaction center surroned by numerous light harvesting complexes. There are two types of photosystems I,and II; they absorb light best at different wavelengths
light-harvesting complex The complex of protiens associated with pigment molecules(including chlorophyll a, chlorophyll b, and cartenoids) that capture light energy and transfers it to reaction cenet pigments in a photosystem
reaction center A protien complex that includes two special chlorophyll a molecules and a molecule called the primary electron acceptor
primary electron acceptor It prevents electrons from dropping back into the ground state
photosystem II (PS II) Its absorb spectrum peaks at 680 nm (red area of spectrum)
photosystem I (PS I) I best abosorbs light at 700nm( red area spectrum)
noncylic electron flow The predominate route for electron flow
cyclic electron flow The alternative path for elctron flow
Created by: maria05010
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