1. Chapter 8.1-Energy and Life

2. Chemical Energy In Cells
Is stored as ATP
Adenosine triphosphate
- Adenine, ribose, 3 phosphate groups
Bonds in ATP can be broken to release energy
Is re-usable
ATP can be re-formed to store energy over and over
Is similar to a rechargeable battery

4. Adenosine diphosphate (ADP) Adenosine triphosphate (ATP)+ = + =
Adenosine diphosphate (ADP)
Phosphate group
(P)
Adenosine triphosphate (ATP)

6. Autotrophs and Heterotrophs
Autotrophs make their own food
Also called producers
Photosynthesizers
Heterotrophs eat or consume food or nutrients
Also called consumers
Herbivores
Carnivores
Omnivores
Autotrophs form the basis of any chain, and make life on Earth possible

7. Chapter 8.2 p. 232 An overview of photosynthesis

8. Photosynthesis Reaction
Occurs in chloroplasts
In symbols:
6CO2 + 6H2O + light → C6H12O6 + 6O2
In words:
Carbon Dioxide + Water + Light → Sugar + Oxygen

9. Cellular Respiration Reaction
Occurs in mitochondria
In symbols:
6O2 + C6H12O6 + → 6H2O + 6CO2 + ATP
In words:
Oxygen + Sugar (Glucose) → Carbon Dioxide + Water + Energy

10. Chapter 9.1 p. 253 Comparing photosynthesis and cellular respiration

11. Comparing Photosynthesis and Cellular Respiration
Removes CO2 from the atmosphere
Releases O2 into the atmosphere
Turns CO2 into food (sugar)
Releases CO2 into the atmosphere
Removes O2 from the atmosphere
Uses O2 to turn sugar into energy