7-8 chapter7 test review 2012 key

Chapter 7 Test Review Cells are Busy Places! 1) Photosynthesis occurs in chloroplasts and converts light energy into chemical energy. Key Ideas: • Plants and animals require energy to function. • Plants exchange gases with the atmosphere. • Plants use light energy, carbon dioxide and water to make sugars. • Sugars produced during photosynthesis are used for maintenance and growth. 2) Cellular respiration provides the energy for cells to function. Key Ideas: • Cellular respiration occurs in the cells of ALL living things. • Cellular respiration converts glucose into ATP, the form of energy used by cells. 3) The sun provides the energy for almost all living systems on Earth. Key ideas • Photosynthesis connects the sun to the energy needs of all organisms, including animals. • Biosynthesis and breakdown reactions provide the energy and matter needed by organisms. • Photosynthesis and cellular respiration explain where most organisms get the matter and energy they need to survive. The following questions, IF you study them, should be of great assistance on the upcoming test! 1. Compare the reactants of the photosynthesis equation to the products of the equation for respiration. (Note: Use equations shown in E 337 Powe ring Cellular Activities). What do you notice? 6 CO2 + 6 H20 + light C6H12O6 + 6 O2 C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATP 2. Compare the reactants of the respiration equation to the products of the Photosynthesis equation. What do you notic e? 6 CO2 + 6 H20 + light C6H12O6 + 6 O2 C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATP 3. How many molecules of carbon dioxide and how many molecules of water are needed for green plants to synthesize one molecule of glucose and six molecules of oxygen? 6 CO2 + 6 H20 + light C6H12O6 + 6 O2 ame:___ _______ er o :_____ _ ate:_ _______

7-8 chapter7 test review 2012 key

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