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Chapter Slides - • Photoautotrophs – Carbon source is...

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Unformatted text preview: • Photoautotrophs – Carbon source is carbon dioxide – Energy source is sunlight • Chemoheterotrophs – Carbon source is organic matter (living or non-living) – Energy source is chemical (organic matter: living or non-living) Carbon and Energy Sources Photoautotrophs • Capture sunlight energy and use it to carry out photosynthesis – Plants – Some bacteria (e.g. cyanobacteria) – Many protistans (algae, such as diatoms, dino- fagellates and coccolithophores) Carbon dioxide, water are required Carbon dioxide, water are released Oxygen is released Oxygen is required 1) Water is split by light energy. Oxygen escapes. Coenzymes pick up hydrogen & e- . 2) Chemical (ATP) energy drives synthesis of glucose from hydrogen and electrons, plus carbon and oxygen (from CO 2 ). ATP is available to drive cellular tasks 1) Glucose is degraded to CO 2 and water. Coenzymes pick up electrons and hydrogen. 2) Coenzymes give up electrons and hydrogen to oxygen-requiring transfer chains that release energy to drive ATP formation. 12H 2 O + 6CO 2 6O 2 + C 6 H 12 O 6 + 6H 2 O Water Carbon Dioxide Oxygen Glucose Water Photosynthesis Equation Light energy 12H 2 O + 6CO 2 6O 2 + C 6 H 12 O 6 + 6H 2 O Water Carbon Dioxide Oxygen Glucose Water Photosynthesis Equation Light energy Is this a balanced equation? Where Atoms End Up...
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This note was uploaded on 02/10/2011 for the course MSCI 102 taught by Professor Benner during the Spring '10 term at South Carolina.

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Chapter Slides - • Photoautotrophs – Carbon source is...

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