2. Photosynthesis and Cellular Respiration

3. PHOTOSYNTHESIS Most important biological process on earth Fills food requirements & needs for fiber & building material – Petroleum, natural gas, coal, firewood Photo means “light” Synthesis means “to put together” Photosynthesis happens in the chloroplast in plants, some bacteria, and some protists.

4. The Equation Reactants Products Carbon dioxide + Water sunlight Glucose + Oxygen (carbohydrate) 6CO 2 + 6H 2 0C 6 H 12 O 6 + 6 0 2

6. Cellular Respiration

7. Where does it happen? In the Cell –Mitochondria “powerhouse of the cell”

8. Steps in cellular respiration 1.Sugar (glucose= C 6 H 12 O 6 ) from food is eaten. 2.Oxygen ( 0 2 ) is inhaled (breathed in from the water in some organisms). 3.Food is broken down with the help of oxygen through body chemical reactions (metabolism). 4.Carbon dioxide ( CO 2 ) and water ( H 2 0 ) are exhaled. 5.36 are produced in the reaction, which is energy needed for cellular activity. ATP

9. The equation Reactants Products Glucose + Oxygen Carbon dioxide + Water + Energy (carbohydrate) 6CO 2 + 6H 2 0+C 6 H 12 O 6 + 6 0 2 ATP

10. CELLULAR RESPIRATION DIAGRAM MITOCHONDRION (IN THE CELL)

11. Comparing both processes You can say that the formulas for photosynthesis and cellular respiration are the exact opposite: Photosynthesis: Cellular Respiration: 6CO 2 + 6H 2 0 ATP C 6 H 12 O 6 + 6 0 2 NOTE: ATP is produced in both reactions, but CELLULAR RESPIRATION produces all the ATP needed for cells to function.