1. AHSGE OBJECTIVE 3 Identify reactants and products associated with photosynthesis and cellular respiration, and the purposes of these two processes.

2. AHSGE OBJECTIVE 3 • ELIGIBLE CONTENT • Identify the chemical formula for photosynthesis. • Identify the function of photosynthesis. • Identify the chemical formula for respiration. • Identify the function of respiration. • Identify the relationship between photosynthesis and respiration.

3. AHSGE OBJECTIVE 3 Study the equation below: 6 CO2 + 6 H2O + sunlight  --?-- + 6 O2 Which product is missing from the equation? • A sugar • B water • C carbon • D hydrogen

4. AHSGE Obj 3 Photosynthesis And Respiration • Which two substances are products of respiration? • A) water and oxygen • B) sugar and oxygen • C) water and carbon dioxide • D) carbon dioxide and sugar

5. Photosynthesis • Uses energy from the sun to make food • Stores it in chemical bonds in sugars • This is how most of the energy for living things originates with the sun

6. Photosynthesis • Broken down into two parts • Light dependent reactions and light independent reactions

7. Photosynthesis • Light dependent reactions make ATP • Light independent then take the ATP and use it to make sugars

8. Light dependent reactions • Frees electrons to split water molecules and make ATP • Electrons are moved down electron transport chain. • Splitting water frees electrons to replaced those freed earlier and produces the oxygen released by photosynthesis (photolysis)

9. Light independent reactions • Calvin cycle: occurs in stroma of the chloroplast • Uses carbon dioxide to make sugars

10. Cellular Respiration • Combines oxygen with food (glucose) to provide energy for living things. • Cells use energy from food to convert ADP into ATP storing energy in the chemical bonds that hold on the extra phosphate. • ADP can then be recycled and used again to form more ATP

11. Cellular Respiration • First stage is glycolysis • Glycolysis is anaerobic and occurs in the cytoplasm of the cell • Frees 4 ATP

12. Cellular Respiration • Next stage takes place in the mitochondria • Citric acid cycle • Also uses electron transport chain to make ATP

13. Cellular Respiration • A total of 36 ATP is produced by cellular respiration, but 4 are used during the process, leaving a balance of +32.

14. Fermentation • Breaking down food for energy without oxygen • Alcohol and lactic acid are two types of fermentation • The body uses lactic acid fermentation when oxygen supplies are not enough to continue with normal cellular respiration • Not very efficient, makes you feel the burn