MMG301 1nd Edition Lecture 8Outline of Last Lecture I. FermentationOutline of Current Lecture II. PhotosynthesisIII. Chlorophylls IV. Accessory pigmentsCurrent Lecture-photosynthesis in eukaryotes-occurs in green plants and algae-all contain chloroplasts (the site of photosynthesis)-all perform oxygenic photosynthesis-phototrophic bacteria-1. Cyanobacteria:-perform oxygenic photosynthesis-ancestors of chloroplasts-do photosynthesis using thylakoid membranes-2. Purple bacteria: -anoxygenic photosynthesis-have invaginations of the cytoplasmic membrane called vesicles or lamellae-3. Green bacteria:-anoxygenic photosynthesis-have chlorosomesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-4. Heliobacteria:-anoxygenic photosynthesis-have only a cytoplasmic membrane (no extra membrane inside of the cell)-types of photosynthesis in microorganisms-oxygenic: -yields oxygen-used by cyanobacteria and algae-anoxygenic:-yields oxidized sulfur-some also oxidize hydrogen or other organic compounds-chlorophylls:-different chlorophylls absorb different lights, so there is less competition for light energy-accessory pigments-carotenoids: -present in all photosynthetic organisms-main function is photoprotection-can increase efficiency of light harvesting-alternating double bonds of long hydrocarbon chains-membrane bound-phycobiliproteins:-only in cyanobacteria and red algae-function in light harvesting, form large light harvesting complexes called phycobilisomes-phycobilins attached to proteins-the calvin cycle:-used in cyanobacteria, algae, and plants-6 CO2 + 12 NADPH + 18 ATP Fructose-6P + 12 NADP+ + 18 ADP + 18
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