Biology 1002B Lecture Notes - Lecture 6: Photosystem Ii, Photosynthetic Reaction Centre, Photosystem I

• School: Western University
• Department: Biology
• Course: Biology 1002B
• Professor: Tom Haffie Denis Maxwell

Document Summary

From independent preparation assignment: characteristics of a catabolic versus anabolic pathway (relation to delta g) catabolic pathway: a series of chemical reactions that results in the breakdown of larger, more complex molecules into smaller, less-complex ones. Energy is released, the over all free energy is less in the products than the reactants. Food molecules converted into co2 and h2o anabolic pathway: series of reactions that results in the synthesis of larger, more-complex molecules from simpler starting molecules. Require free energy because the free energy of products is larger than the reactants. Biosynthesis of carbs, proteins, nucleic acids, photosynthesis catabolic and anabolic pathways are linked through chemical energy. Chemical energy comes from catabolic pathways to give energy to anabolic pathways. The electrons needed to reduce nadp+ come from the oxidation of h2o resulting in the release of o2. In the calvin cycle, electrons and protons carried by nadph and the energy of atp hydrolysis are used to convert co2 into carbohydrate.