| A | B |
|---|
| Organisms, such as plants, that make their own food are called ___. | autotrophs |
| Organisms that can't make their own food and must obtain their energy from food they consume are called ___. | heterotrophs |
| How many phosphate groups does ATP have? | Three (that's why it is called adenosine tri-phosphate) |
| How many phosphate groups does ADP have? | Two (that's why it is called adenosine di-phosphate) |
| Energy is released from an ATP molecule when __. | a phosphate group is removed. |
| When ATP releases energy, ___ is formed. | ADP |
| ATP provides ____ for the mechanical function of cells. | energy |
| The energy in most food comes originally from ___. | sunlight |
| The formation of ADP from ATP ____ energy. | releases |
| The formation of ATP from ADP ____ energy. | requires |
| The energy required by consumers to convert ADP into ATP comes from _______. | the food they eat |
What is the name of the molecule pictured below?,  | ATP (adenosine tri-phosphate). Notice the three phosphate groups.,  |
What is the name of the molecule pictured below?,  | ADP (adenosine di-phosphate). Notice it has two phoshate groups),  |
| ATP --> ADP + P is an _____ reaction. | exothermic (because it releases energy that can be used for cellular processes) |
| ADP + P --> ATP is an ____ reaction. | endothermic (because it requires energy to put the 3rd phosphate back onto ADP to form ATP, but that energy is then stored in the ATP molecule and can be used again once ATP is broken back down into ADP + P) |
