Unit III Ch7 Photosynthesis BB

Unit III Ch7 Photosynthesis BB - Biology Life on Earth...

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Unformatted text preview: Biology: Life on Earth Lecture for Chapter 7 Capturing Solar Energy: Photosynthesis Glucose Glucose 6CO2 + 6H2O + light energy C6H12O6 + 6O2 O2 rare in atmosphere before Photosynthesis Sun emits electromagnetic radiation – photons Visible light energy is: 1. Transmitted 2. Reflected Chlorophyll a reflects/transmits green 3. Absorbed – drives photosynthesis Chapter 7 Chapter Glucose = chemical potential energy3 granum (stack of Thylakoids) Stoma CO2 in O2 & H2O out Photo + Synthesis from H2O from PS II PS I Chapter 7 Chapter Glucose = sugar 5 Thylakoids contain 1000’s of Photosystem s (PS II & PS I) 250 – 400 chlorophyll & carotenoid pigments Reaction center is chlorophyll a that loses high energy e­ and Electron Transport Chains (ETCs) Light Dependent Reactions Light Dependent Reactions Light Proteins embedded in thylakoid membranes make ATP & NADPH Chemiosmosis Chemiosmosis Light Depend. Rxns. Process of ATP Process ATP generation generation + ETC: H Active Transport Active up gradient up powered by energized e+ ATP Synthase: Photo + Synthesis PS II PS I Chapter 7 Chapter Glucose 9 Light Independent Reactions in Stroma of chloroplast Carbon Fixation Carbon Carbons in Carbons glucose come from 6 CO2 from Increase chlorophyll a Initial effect on photosynthesis increase blue light increase green light little effect CO2 increase H2O increase sunlight increase temperature increase ...
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This note was uploaded on 05/26/2011 for the course BIO 111 taught by Professor Osikanlu during the Spring '09 term at Moraine Valley Community College.

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