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Quiz Section 4.1 ATP and Energy 1. What are these molecule? Which one do cells use for energy – to power cell function? Which one is the low energy “precursor?” 2. How is energy released from a molecule of ATP? A. By adding a phosphate group to ATP. B. By combining a molecule of ATP with ADP. C. By removing the third phosphate group from the ATP D. By lowering the activation energy of a phosphate group in ATP. 3. What kind of molecule provides the most ATP when it is broken down? A. B. C. D. Carbohydrate Lipid Protein Starch 4. How is ADP converted into ATP? A. Three phosphate groups are added to ADP. B. One phosphate group is removed from ADP. C. One phosphate group is added to ADP, which requires the cell to expend additional energy. D. One phosphate group is added to ADP but no extra energy is required. 5. Why do organisms need to digest their food? A. Because as the food is digested, energy is released to the body. B. In order to extract the ATP found in food. C. To free up the amino acids found in food so cells can create ATP. D. To break down food into smaller molecules that cells can use to make ATP.