1. Photosynthesis and Respiration

2. Metabolism
The total of all chemical reactions that take place in an organism. Most chemical reactions in an organism require enzymes. An enzyme is a protein that speeds up a chemical reaction.

3. Photosynthesis carbon dioxide + water → glucose + oxygen
The process of converting light energy into chemical energy and storing that energy in the bonds of a sugar (glucose)
Producers – including plants, algae and some bacteria – are photosynthetic
Takes place in the chloroplast of a cell
carbon dioxide + water → glucose + oxygen
CO H2O → C6H12O O2

4. Photosynthesis Almost all living things depend on sunlight!
carbon dioxide
oxygen
Sunlight
(energy)
glucose
water

5. Cellular Respiration
Respiration – the process in which chemical reactions break down food molecules into simpler substances and release stored energy. There are two types of cellular respiration – aerobic and anaerobic.

6. Aerobic Respiration
Uses oxygen to release energy from glucose in order to generate a maximum of 38 ATP (adenosine triphosphate)
Occurs in both producers and consumers

7. Electron Transport Chain
Aerobic Respiration
Step
Glycolysis
Kreb’s
Cycle
Electron Transport Chain
Occurs In
Cytoplasm
Mitochondria
glucose + oxygen → carbon dioxide water
C6H12O O → CO H2O

8. Aerobic Respiration
oxygen
carbon dioxide
water
glucose
ATP
(energy)

9. Anaerobic Respiration
Does not use oxygen to release energy from glucose and only generates 2 ATP. This occurs when there is no oxygen or not enough oxygen for aerobic respiration.
Occurs in both producers and consumers.
Takes place in the cytoplasm.
Products include carbon dioxide, lactic acid and alcohol.

10. Photosynthesis vs. Cellular Respiration
Reactants
carbon dioxide and water
glucose and oxygen
Products
Where it Occurs
chloroplast
cytoplasm and mitochondria
When it Occurs
In the light
anytime
Occurs in Producers?
Yes
Occurs in Consumers? No

11. Photosynthesis vs. Cellular Respiration
glucose + oxygen
ATP (energy)
sunlight
(energy)
carbon dioxide + water