Which of the following best describes the chemical equation shown below? c6 h12 o6 + 6o2 → 6co2 + 6h2o 1. photosynthesis: carbon dioxide and water are used and glucose and oxygen are produced. 2. respiration: glucose and oxygen are used and carbon dioxide and water are produced. 3. respiration: lipids and water are used and carbon dioxide and glucose are produced. 4. photosynthesis: proteins and oxygen are used and carbon dioxide and water are produced.