Which of these molecular structures could be found in a lipid, but not in a carbohydrate, protein, or nucleic acid? A. a long chain of carbon, oxygen, and nitrogen atoms B. a long chain made only of carbon and hydrogen atoms C. a phosphate group joined to a chain of carbon atoms D. an amino group and a carboxyl group bonded together

Text version using the diagram above, match the description to the corresponding location in the carbon cycle model. provide the letter only. carbon dioxide is converted to sugar used for food. carbon trapped in fossil fuels is converted to carbon dioxide. organic carbon is converted to fossil fuels. carbon dioxide is converted to carbonates. sugar is broken down and converted to carbon dioxide. location location location location location