1. So…how do we get the energy they need to survive?
Unit 5 Cell Energetics!
Part 1: Energy & Intro
So…how do we get the energy they need to survive?

2. Law of conservation of Energy
Energy cannot be created or destroyed…just transferred/converted

3. Where on earth does energy originally come from??
Make sure to state energy comes from the sun (except in deep sea conditions where chemicals power life from sulfur vents…cool!)

4. Energy flow Photosynthesis Cellular Respiration
Converts energy from the sun into energy stored in molecules (potential energy)
Cellular Respiration
Converts the potential energy from molecules into usable energy
Make sure I stat they are interrelated and feed eachother

5. Adenosine Triphosphate
Does it look familiar?
Energy is stored in the BONDS (in this case we’re breaking the phosphate bonds)
Recycled & reused

7. Phosphorylation Transfer of phosphate group AND energy Enzyme-mediated
ATP Synthase (makes ATP)
m/watch?v=XI8m6o0gXD Y
ATPase (breaks ATP)

8. So… Why? How? Easy way to store energy Easy way to access energy later
Photosynthesis converts light energy into chemical energy (into monosaccharaides like glucose!)
Cell respiration converts chemical energy (sugar) into ATP for mechanical energy!

9. Photosynthesis is how autotrophs harness and use light energy to make sugar and oxygen gas from carbon dioxide and water
Light
energy
PHOTOSYNTHESIS 6
CO2 +
H2O
Carbon dioxide
Water
C6H12O6 O2
Glucose
Oxygen gas
What does it need? (Input)
What does it make? (Output)

10. Cellular Respiration
Cellular respiration is a 3-step process of breaking down glucose to produce ATP…and LOTS of it!!!
What does it need? (Input)
What does it make? (Output)

11. PS vs CR Photosynthesis Cellular Respiration Inputs: Outputs:
Make a table!!
Photosynthesis
Plants & some bacteria
Inputs:
Light energy
H2O
CO2
Outputs: O2
C6H12O6
Cellular Respiration
Plants & animals
Inputs:
C6H12O6 O2
Outputs:
CO2
H2O
ATP

12. Learning Check What are the inputs of Photosynthesis?
What are the outputs of photosynthesis?
What are the inputs of cellular respiration?
What are the outputs of cellular respiration?
What is the energy molecule for the cell?
Starting from the sun…summarize how YOU get energy (ATP)