Exam 2 L2 - Photsynthesis I and II

Exam 2 L2 - Photsynthesis I and II - Photosynthesis Site of...

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Photosynthesis Site of photosynthesis - chloroplast - thylakoid - lumen: inside the thylakoid - stroma the matrix between the thylakoid and chloroplast membrane Summary of Photosynthesis: When a photon strikes an electron, energy is imparted to electron. Electron is boosted in energy to another energy level (or electron shell). However: the 2 nd law of thermodynamics stipulates that the electron will lose energy and fall back 1) endergonic (“uphill”) reaction: sunlight energizes electron to a high energy state. 2) energized electron falls back downhill, energy is harvested as ATP and NADPH. 3) harvested energy drives the uphill reaction that makes glucose from CO 2 and water. 1) Light Dependent Reaction (“Photo”) - antenna complex: light absorbed by an array of pigments - photosystems: special chlorophyll molecules that carry out reactions of photosynthesis - the sun’s energy boosts an electron out of the chlorophyll molecule - the electron is captured in an electron transport chain, where its energy is harvested
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This note was uploaded on 02/08/2011 for the course BIO 101 taught by Professor Cantwell during the Fall '08 term at University of Tennessee.

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Exam 2 L2 - Photsynthesis I and II - Photosynthesis Site of...

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