Lecture 23- Respiration 1

Lecture 23- Respiration 1 - Lecture 23- Respiration 1...

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Catabolic Reaction - When a molecule is broken down - -ΔG, exergonic Anabolic Reaction - Builds things, E.g., biosynthesis of chlorophyll - Overall reaction is endergonic, +ΔG (but intermediate reactions may have a –ΔG) Energy Rich Molecules - E.g., gasoline, glucose; both good fuels, have hydrogen, organic - C-H bond means good fuel; neither atom is electronegative, so the electrons they share are equal differences from both nuclei, so they are the farthest away from each nuclei they could possibly be - The farther away an electron is from the nucleus, the more potential energy it has - If an electron moves farther away from the nucleus it gains energy; it an electron moves closer to nucleus it loses energy (energy is released) Fat- all C-H bonds, therefore high potential energy Sugar- lots of C-H, but some O Protein- lots of O Oxygen - Very electronegative, doesn’t want to give up electrons, pulls electrons off of things - Gets reduced; drives combustion reactions; (wants the electrons), the transfer of electrons is when energy is liberated - High redox potential (mV); strong oxidizing agent
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Lecture 23- Respiration 1 - Lecture 23- Respiration 1...

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