BIOS 10161 Study Guide - Midterm Guide: Electrochemical Gradient, Succulent Plant, Pyruvic Acid
3 Sep 2016
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Anabolic process where sunlight is captured and used to convert co2 into complex carbon compounds. Oxygenic; anoxygenic (no o2 byproduct) non-water molecules used as electron donors to replace electron excited in chlorophyll (hydrogen sulfide h2s) Head of chlorophyll molecule absorbs light energy, porphyrin ring w mg ion. Chlorophyll + hydrocarbon tails light harvesting/ antenna complexes surround reaction center photosystem thylakoid membrane. Antenna complex: parabolic dish with different sets of pigments w/ the property of being able to absorb photons pass energy via resonance energy transfer. Resonance (energy) passed between molecules until it reaches chlorophyll a. Reaction center @ center of parabolic dish oriented in just the right way absorbs so much energy that it loses an electron snatched by electron acceptor. Psii- water splitting complex; singlet oxygen so dangerous. Sometimes it escapes pokes holes in membranes (destructive) Psi grabs electron from last carrier and etc. Cell respiration @ mitochondria: carbohydrate dependent atp synthesis// photosynthesis.
