 How do animals get energy? What about plants?
 How do animals store energy? What about plants?
 How do you starve an animal? What about a plant? Explain your answer.

 Write words in white
 Yellow words mean you need to do something!

 Cells must convert food into a form of energy they can use.
 They cannot cash in carbohydrates for energy.
 Analogy: You cannot use money stored in the bank. You first need to turn it into cash.

 Cells convert carbohydrates into
ATP
○ ATP(adenosine triphosphate): molecule used to carry chemical energy
○ Carries energy in its bonds

adenosine
 Make a double bubble in your notes comparing the structures of ATP and ADP
 2 similarities and 1 difference
 Which carries more energy? Why?
adenosine
ADP triphosphate
ATP diphosphate

How does ATP Release Energy?
 Energy is released when a phosphate group is removed.
 ADP (2p) is changed into ATP (3p) when a phosphate group is added.

 Carbohydrates and other foods consumed by the body contain energy.
 When they are broken down, energy is released and is used to reattach the phosphate molecule to the ADP, turning it back into ATP.

How is ATP like a rechargeable battery?

How do Organisms get their
Food?
1. Autotrophs: make their own food using inorganic compound a) Phototrophs: use the sunlight b) Chemotrophs: use chemicals
2. Heterotrophs : eat other organisms for food

 Plants also need ATP
 They do not directly use organic molecules (ex. Carbohydrates)
 They use energy produced from photosynthesis (make sugars from sunlight)

All cells break down macromolecules for energy
 Both Heterotrophs and Autotrophs contain energy in the form of organic molecules.
 To get energy all organisms must convert food into a form of energy they can use.
 Even plants need to eat. The only difference is that they make their own food.