1. Lecture: ATP and Intro to Photosynthesis and Cellular Respiration

2. Energy and ATP Energy comes in many different forms Energy comes in many different forms Light, heat, electrical, chemical, etc Light, heat, electrical, chemical, etc Cells are powered by chemical energy Cells are powered by chemical energy ATP- Adenosine Triphosphate- principle compound used by all living things to fuel life processes ATP- Adenosine Triphosphate- principle compound used by all living things to fuel life processes Energy is in the bonds between phosphate groups Energy is in the bonds between phosphate groups Like a rechargeable battery, ATP- A charged battery, ADP-a dead battery Like a rechargeable battery, ATP- A charged battery, ADP-a dead battery

3. Energy and Carbohydrates Carbs are much better for storing energy, 1 molecule of glucose has over 90x more energy than a molecule of ATP! Carbs are much better for storing energy, 1 molecule of glucose has over 90x more energy than a molecule of ATP! Carbohydrates like glucose are made by autotrophs (producers) through photosynthesis or chemosynthesis Carbohydrates like glucose are made by autotrophs (producers) through photosynthesis or chemosynthesis Photosynthesis occurs in the chloroplast Photosynthesis occurs in the chloroplast Equation for Photosynthesis: Equation for Photosynthesis: 6CO 2 + 6H 2 O + energy  C 6 H 12 O 6 + 6O 2 Carbon + water+ light  sugar + oxygen dioxide dioxide

4. Cellular Respiration Release of energy from food occurs in the mitochondria Release of energy from food occurs in the mitochondria Most common pathway of obtaining energy from food occurs in the presence of oxygen= cellular respiration Most common pathway of obtaining energy from food occurs in the presence of oxygen= cellular respiration Aerobic organisms Aerobic organisms Equation for Cellular Respiration: Equation for Cellular Respiration: 6O 2 + C 6 H 12 O 6  6CO 2 + 6H 2 O + energy Oxygen + sugar  carbon + water + … dioxide dioxide

5. Sunlight energy ECOSYSTEM Photosynthesis in chloroplasts GlucoseCO 2 O2O2 H2OH2O Cellular respiration in mitochondria (for cellular work) Heat energy ATP Physiological Energy Flow Summary