Biology Lecture 21 - Biology Lecture 21 Energy flows into...

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Biology Lecture 21 Energy flows into an ecosystem as sunlight and exits as heat Photosynthetic organisms take in that sunlight and coverts it to oxygen and organic molecules Mitochondria take in the organic molecules and oxygen and produce ATP while carbon dioxide and water are recycled Photosynthesis and cellular respiration are redox reactions Photosynthesis: 6CO 2 + 6H 2 O + Solar Energy → C 6 H 12 O 2 + 6O 2 Cellular Respiration: C 6 H 12 O 2 + O 2 → CO 2 + H 2 O + Energy (ATP) Cellular respiration breaks down organic molecules, an exergonic process Generates ATP Includes both aerobic (with oxygen) and anaerobic respiration (without oxygen) Energy is created from the bonds in the organic molecules that are broken down Energy released from burning of glucose is used to make the ATP Involves energy coupling and some of the energy is lost as heat During cellular respiration, electrons are transferred. The energy released from these transferred electrons is used to synthesize ATP In redox reactions, one of the reactants loses an electron and the other gains an electron
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This note was uploaded on 05/03/2011 for the course BIO 311 C taught by Professor Mcclelland during the Fall '09 term at University of Texas at Austin.

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Biology Lecture 21 - Biology Lecture 21 Energy flows into...

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