ATP is the cell's source of energy and is used by almost all biological reactions. It has three parts - an adenine base, a ribose sugar, and three phosphate groups. When ATP is broken down, it releases energy and is converted to ADP by breaking the bond of the terminal phosphate. This energy is then used by the cell, and more energy is required to reattach the phosphate to ADP and reform ATP.

1. Structure and Function of ATP

2. What is ATP? ATP is the cell’s source of energy. It is used by almost all biological reactions that occur in your body.

3. Structure 3 Parts: Adenosine (nitrogenous base) Ribose (sugar) Three Phosphates

4. Source of Energy During chemical reactions ATP gets broken down into ADP (Adenosine Di-Phosphate). The bond that holds the last phosphate group is broken. When this bond is broken energy is released.

5. ADP - ATP Energy is then needed to re-create the bond and form ATP

6. ATP Cycle

7. ATP Cycle

8. Summary Questions What is the biological importance of ATP? When ATP is broken down, what is it converted into? Where do we get the energy to make ATP from?