This document provides information about and compares the processes of photosynthesis and cellular respiration. It explains that cellular respiration is how animal and plant cells obtain energy from glucose and occurs in the mitochondria through the breakdown of glucose. Photosynthesis occurs only in plant cells and is how plants make glucose from sunlight, water and carbon dioxide in the chloroplasts using chlorophyll. The key equations for each process are also presented, with cellular respiration using glucose and oxygen to produce carbon dioxide, water and ATP, while photosynthesis uses light, water and carbon dioxide to produce sugar and oxygen.

1. Photosynthesis
vs.
Cellular Respiration
Ms. Liu
Biology
2/9/12

2. Cellular Respiration
• How animal AND plant cells obtain
energy: ATP

3. Cellular Respiration
What happens?
• We eat food which contains sugar
(glucose) and…..it goes into our cells

4. Photosynthesis
• Glucose = the simplest sugar
– It’s in ALL foods that we eat and some drinks
– Breaking down of glucose  Glycolysis

5. Cellular Respiration
• Animal cells have special organelle called:
MITOCHONDRIA
– It’s a “Power house” of the cell and where
glucose is broken down to make ATP

6. Cellular Respiration
• ATP = Adenosine Triphophate
– A form of usable energy that ALL
living things need

7. Cellular Respiration
EQUATION:
Glucose + Oxygen  CO2 + Water + ATP
(Reactants) (Products)

8. Photosynthesis
• Occurs in PLANT cells only.
• How they make sugar  glucose

9. Photosynthesis
How does photosynthesis occur?
• Need sunlight, water, and carbon dioxide

11. Photosynthesis
• These components are then transformed
into sugar (glucose) in the
CHLOROPLAST
– A special green organelle in plant cells only

12. Photosynthesis
• A pigment called: CHLOROPHYLL
Captures sunlight
energy

13. Photosynthesis
• EQUATION:
Light + Water + CO2  Sugar + oxygen
(Reactants) (Products)

14. So then how do plants get
energy, or ATP?

15. They use cellular respiration
too… but after
photosynthesis!!!

17. Bellringer
• Start on “Photosynthesis Riddles”:
– Answer 2 questions
– 5 min

18. EXTRA Credit
• Create comic strip (5 boxes) explaining:
– Photosynthesis OR
– Endothermic and exothermic reactions
• Due on day of test (Wednesday next
week)