Apply: food and energy in organisms

A diagram shows the overall chemical equation for cellular respiration along with models of the molecules involved. According to the equation, 1 molecule of glucose (C 6 H 12 O 6) plus 6 molecules of oxygen (O 2) produce 6 molecules of carbon dioxide (C O 2) and 6 molecules of water (H 2 O). A model shows that one molecule of glucose has 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Another model shows that each oxygen molecule has 2 oxygen atoms. So, 6 molecules of oxygen have 12 oxygen atoms total. Another model shows that each carbon dioxide molecule has 2 oxygen atoms and 1 carbon atom. So, 6 molecules of carbon dioxide have 12 oxygen atoms and 6 carbon atoms total. Another model shows that each water molecule has 2 hydrogen atoms and 1 oxygen atom. So, 6 molecules of water have 12 hydrogen atoms and 6 oxygen atoms total.