Respiration & photosynthesis

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    18-Nov-2014

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<ul><li> 1. Energy Transformations: Photosynthesis &amp; Respiration</li></ul> <p> 2. Read pages 218-220 </p> <ul><li>What is energy? </li></ul> <ul><li>List 2 processes (in the cell) that require energy (the ability to do work). </li></ul> <ul><li>What is the difference between an autotroph and a chemotroph? </li></ul> <ul><li>What is metabolism? </li></ul> <p> 3. ATP &amp; ADP </p> <ul><li>ATP: Adenosine triphosphate </li></ul> <ul><li>adenine + ribose + 3 phosphates </li></ul> <ul><li>Energy storing molecule, only stores energy for a few minutes </li></ul> <ul><li>Source of all cell energy </li></ul> <ul><li>When one phosphate group breaks off, energy is released </li></ul> <p>Adenine Ribose 3 Phosphate groups 4. </p> <ul><li>ADP: Adenosine diphosphate </li></ul> <ul><li>Adenine + ribose + 2 phosphates </li></ul> <ul><li>Molecule that results from ATP losing one P </li></ul> <ul><li>Another P may be added later </li></ul> <p>ADP ATP Energy Energy Partially charged battery Fully charged battery Adenosine diphosphate (ADP) + PhosphateAdenosine triphosphate (ATP) 5. Describe organelles involved in energy transformation </p> <ul><li>Energy transformation is when energy is converted from one form to another. </li></ul> <ul><li>Energy transformations involve photosynthesis and respiration. </li></ul> <p> 6. Photosynthesis 7. </p> <ul><li>CHLOROPLASTS: </li></ul> <ul><li>Found in plant cells, some protists &amp; bacterianot animal cells </li></ul> <ul><li>Contain pigment called chlorophyll (green) </li></ul> <ul><li>Allows plants to go through photosynthesis by converting light into energy for the cell </li></ul> <p> 8. Overview Photosynthesis </p> <ul><li>Photosynthesis:process using energy from sunlight to convert water and CO 2into oxygen and carbohydrates (sugar) </li></ul> <ul><li>Two parts: </li></ul> <ul><li>Light dependent reactions: produce O 2&amp; converts ADP to ATP </li></ul> <ul><li>Calvin cycle (dark reactions): use ATP from light reactions to produce sugars </li></ul> <p>Light Energy CO 2+ H 2 O Sugars + O 2 Chloroplast 9. </p> <ul><li>Chlorophyll :green pigment in cells that absorbs blue &amp; red light energy </li></ul> <ul><li>Moves energy to electrons that drive reactions </li></ul> <ul><li>Equation for photosynthesis: </li></ul> <ul><li>6CO 2+6H 2 O + energyC 6 H 12 O 6+ 6O 2 </li></ul> <p> 10. </p> <ul><li>MITOCHONDRIA:powerhouse of cell </li></ul> <ul><li>Releases energy from food molecules </li></ul> <ul><li>Found in both animal and plant cells </li></ul> <ul><li>A cell that needs more energy has more mitochondria</li></ul> <ul><li>Ex: muscles, growing cells, areas of repair </li></ul> <p> 11. Overview cellular respiration </p> <ul><li>Respiration:process that releases energy by breaking down food when oxygen is present </li></ul> <ul><li>Equation for Respiration: </li></ul> <ul><li>C 6 H 12 O 6+ 6O 2 6CO 2+ 6H 2 O + energy </li></ul> <p> 12. </p> <ul><li>Anaerobic respiration: (fermentation) occurs without oxygen present </li></ul> <ul><li>Two types: </li></ul> <ul><li>Alcoholic: form ethyl alcohol and CO 2as waste products; used to make bread rise </li></ul> <ul><li>Lactic acid: produces lactic acid in muscles when exercising without enough oxygen </li></ul> <p> 13. Photosynthesis Respiration Function Energy storage Energy release Location Chloroplasts Mitochondria Reactants Carbon dioxide water Glucose oxygen Products Glucose oxygen Carbon dioxide water Equation </p> <ul><li>6CO 2+6H 2 O + energyC 6 H 12 O 6+ 6O 2 </li></ul> <p>C 6 H 12 O 6+ 6O 2 6CO 2+6H 2 O + energy </p>

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