1. Photosynthesis Where does this occur? Why?
“Putting together with light”
Where does this occur?
Mesophyll – Palisade
Cells
Why?
Where majority of chloroplasts are located

2. Stages of Photosynthesis
Capturing the Sun’s Energy- energy from sun is absorbed by chlorophyll and used to split molecules of Water (H2O) into molecules of Hydrogen (H) and Oxygen (O2).
Producing Sugar- Energy from sun is also used to combine
Hydrogen (H) with Carbon Dioxide (CO2) to produce glucose (C6H12O6)
H H
H20 O H +
CO2 =
C6H12O6

3. 6 6 C6H12O6 + O2 6 CO2 + H2O + Energy “Putting together with light”
Reactants?
Products?
Light 6 6
C6H12O6 + O2 6
CO H2O + Energy
carbon water glucose oxygen
dioxide

4. Chemical equation: C6H12O6 + 6 O2 6 CO2 + 6 H2O + Energy Light
carbon water glucose oxygen
dioxide
6 CO H2O + Energy

5. Cellular Respiration Where does this occur? Chemical equation: ATP
Process by which organisms break down food to release energy
Oxygen must be present
Where does this occur?
mitochondria
Chemical equation:
C6H12O O CO H2O Energy
glucose
Reactants?
Products?
ATP
ATP (Adenosine Triphosphate ) –
an energy-giving molecule used by all living cells.
ALL CELLS PERFORM CELLULAR RESPIRATION!

6. Why is cellular respiration needed by all living organisms?
* To perform all life functions
* Grow, Repair damaged cells, Replace worn out cells
Key Points:
Photosynthesis uses sunlight to create stored energy in the form of
glucose/food.
Cellular respiration uses food/glucose to release energy.

8. Photosynthesis Review