Photosynthesis & Cellular Respiration What is Photosynthesis? The process by which chloroplasts make glucose (food) for the cell. What is Cellular Respiration? The process by which mitochondria make ATP (energy) for the cell. What are the products of photosynthesis? Glucose (sugar) and Oxygen Where does photosynthesis occur? Chloroplasts in plant cells. Where does most of the energy used by living organisms originate? The Sun What is made by cellular respiration? Carbon Dioxide, Water, and ATP Where does cellular respiration occur? The mitochondria in eukaryotic cells (including plants and animals). What makes plants green? Chlorophyll in the chloroplasts. What is fermentation? The process that cells use to make energy when NO oxygen is present. Why do our muscles cramp when you exercise? Cells undergo fermentation and lactic acid builds up. How are photosynthesis and cellular respiration related? The products made by photosynthesis are used by cellular respiration. The products made by cellular respiration are used by photosynthesis.