ATP is known as the universal energy currency in living organisms. The addition of phosphate to ADP by the enzyme ATPase called phosphorylation. ATP is produced in the mitochondria in the cell. ATP cannot be stored and must be made continually.

ATP is produced in mitochondria.

ATP is made up of:

1. phosphate

• ribose

• adenine

Phosphorylation: the attachment of inorganic phosphate group to a biomolecule.

Roles of ATP

-synthesis of DNA

-muscle contraction

-active transport

-nerve transmissions

Advantages of ATP as an energy store

• It requires one enzyme

• universal energy source

• energy is released in small amounts

ATP as an energy carrier

Store chemical energy in fats and carbohydrates.

ATP is needed to make this energy