Lecture 6- photosynthesis 2

Nadph p680 p700 carbon fixation reactions in stroma

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Unformatted text preview: tion reactions in stroma CO2 energy rich Calvin Cycle molecules H2O Carbohydrates (CHO) 1) Non-cyclic electron flow 2) Cyclic electron flow NADPH - molecule that can carry electrons (carries it as phosphate groups) Nicotinamide-adenine-dinucleotide BIOLOGY • Involved in many biochemical redox processes 22-Jan-13 1202B • It serves as an electron acceptor in the enzymatic removal of hydrogen ions form specific substrates Gardiner 9 3 In this diagram of a chloroplast the portion labeled B represents the A. granum B. stroma A C. endoplasmic reticulum B D. outer membrane E. lumen C D E In this diagram of a chloroplast the portion labeled B represents the A. granum B. stroma A C. endoplasmic reticulum B D. outer membrane E. lumen C D E Light Harvesting Complexes BIOLOGY • Reaction Centre Pigments – Chlorophyll a – P680 and P700 1202B • Accessory Pigments – Chlorophyll b, c, d, etc.. – Carotenoids – pass energy to reaction centre 22-Jan-13 Gardiner 12 - job of pigments is to increase wavelength - photosynthetic pigments are required to absorb light and transfer the energy to neighbouring cells - pigment molecules are bound to specific proteins - these proteins are organized within thylakoid membrane into complexes called photosystems - each photosystem is composed of an antenna complex (light harvesting complex) of pigment proteins that surround a central reaction centre - the reaction centre comprises a small number of proteins that bind special chlorop...
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This note was uploaded on 02/11/2014 for the course BIO 1202B taught by Professor Almanke during the Winter '12 term at UWO.

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