Energy and Life
         Section 8-1
                        Energy and Life
      • Energy is the ability to do work.
      • All living things use energy stored in chemical 
         compounds to survive. (FOOD)
      • Heterotrophs – eat food to get energy
      • Autotrophs – make their own food from sunlight and 
         inorganic molecules to get energy.
      •  When are you not using energy? 
    Chemical Energy and ATP
  • Energy from food is changed into another form 
    cells can use.
  • Adenosine Triphosphate (ATP) – energy 
    molecule of the cell  (made by what organelle?)
  • Must break down the foods to generate the ATP.
  • Breaking the bonds between the phosphate 
    atoms will release the energy from ATP.
  • Used ATP is now ADP. (what is ADP?)
  • Energy stored in foods (glucose) will change 
    ADP back into ATP.
                                ATP
            Section 8-1         The ATP molecule!
                                  (Know this structure)
             Adenine                     Ribose                    3 Phosphate groups
                            Figure 8-3 Comparison of ADP and ATP 
                            to a Battery
          Section 8-1
                   ATP being made from ADP!
                      ADP                                           ATP
                                              Energy
     Adenosine diphosphate (ADP) + Phosphate  Energy     Adenosine triphosphate (ATP)
                                 Partially             Fully
                                 charged               charged
                                 battery               battery
                           This energy that will be stored into the 
                           ATP molecule which comes from food!