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Do Now 12/12 Where does most energy originate on this planet? Take out your notes. We are starting a new chapter. 8.1 Energy and ATP Autotrophs and Heterotrophs Energy that living things need, originates from the sun Autotrophs- trap energy from the sun to make their own food Heterotrophs- get their energy by consuming food (other organisms) Chemical Energy and ATP Energy comes in many forms Light, heat, electricity and can be stored in compounds http://www.youtube.com/watch?v=o _5oYuDY2qM ATP (adenosine triphosphate) stores energy in its bonds Cells use it to store and release energy ATP Consists of adenine, a 5-carbon sugar (ribose) and three phosphate groups The phosphates are key to storing energy Question of knowing ATP consists of what three parts? Answer Adenine, a 5-carbon sugar, and three phosphates https://www.youtub e.com/watch?v=4S6X 7qaLjvk ADP Adenosine diphosphate (ADP) similar to ATP but only has two phosphates. When a cell wants to store energy it adds a phosphate to ADP to make ATP ATP is like a Battery Picture ATP as a charged battery ATP provides the energy needed to carry out many functions in the cell https://www.youtube.com/watch?v=JeGx2N alhtg ATP = 3 phosphates = stored energy ADP = 2 phosphates = energy already released Releasing Energy Energy stored in ATP is released by taking away a phosphate ATP can provide energy for active transport, protein synthesis etc. Question of Knowing When a phosphate is added to ADP, a small amount of energy is __________. When a phosphate is removed from ATP, energy is __________. Answer Stored; Released ATP use ATP is constantly being used and renewed in cells. Only a small amount of ATP is present in cells Good for transferring and using energy, but not great for storage Most energy is stored in sugars and starches and then broken down into ATP when needed
