Structure and Function of ATP

What is ATP?

• ATP is the cell’s source of energy.

• It is used by almost all biological reactions that occur in your body.

Structure• 3 Parts:

– Adenosine (nitrogenous base)

– Ribose (sugar)– Three

Phosphates

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.

ADP - ATP

• Energy is then needed to re-create the bond and form ATP

ATP Cycle

ATP Cycle

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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?