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Lecture 11

BIOL 1201 Lecture Notes - Lecture 11: Thylakoid, Light-Dependent Reactions, ChemiosmosisPremium


Department
Biological Sciences
Course Code
BIOL 1201
Professor
Moroney, James
Lecture
11

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BIOL1201Lecture11Photosynthesis
Electromagneticradiation
● Solar
● Energyispropagatedasawave
● Energyisinverselyproportionaltowavelength
Lightabsorptionandphotosynthesis
● Chlorophyllabsorbsblueandredwavelengthsbutnotgreen
● Greenwavelengthsarereflectedortransmittedbyleaves
● Maximumphotosynthesisisproducedwithwavelengthsabsorbedbychlorophylla&b
● Growthofbacteriaisgreatestatredandbluewavelengths
● Photosyntheticrateishighestatthesewavelengths
● Photosynthesisdependsonchlorophyll
Lightreactions
● Lightenergyabsorbedbypigmentsintwoproteinpigmentcomplexes:photosystemsI
andII
● Photosystemsandelectrontransportchainareembeddedinthylakoidsmembranes
● Lightenergydriveselectrontransportchain(ET)fromwatertoNADP+
● ETproducesH+gradientacrossthylakoidmembrane
● ATPisformedbychemiosmosis
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