1. Photosynthesis vs. Cellular
Respiration
Presented By:
Mrs. Nelson

2. Photosynthesis
 Certain organisms can
generate their own food
= glucose
 Autotrophic organisms
 Specialized cells –
plants, some bacteria,
and some protists
 Chloroplast (organelle)
 Chlorophyll (chemical)

3. Process of Photosynthesis
Reactants
1. Carbon Dioxide
2. Water
3. Sunlight
Products
1. Glucose
2. Oxygen

4. Cellular Respiration
 Both heterotrophic
and autotrophic
organisms
 Plants and Animals
 Mitochondria
 Use of oxygen and
carbohydrates to
create energy (ATP)

5. Process of Cellular Respiration
Reactants
1. Glucose
2. Oxygen
Glucose + Oxygen 
Carbon Dioxide + Water + ATP (energy)
Products
1. Carbon Dioxide
2. Water
3. ATP (energy)

6. Contrast
Photosynthesis/Cellular Respiration
 Photosynthesis: (chloroplast- plants only)
6CO2 + 6H2O + light  C6H12O6 + 6O2
 Cellular Respiration:
(mitochondria- plants/animals)
C6H12O6 + 6O2  6CO2 + 6H2O + ATP

7. Heterotrophic vs. Autotrophic
 Cells that don’t have chlorophyll, cannot
make their own food (heterotrophic).
 Heterotrophs and autotrophs are dependent
on each other. How?