Q1. How may you use a radioactive isotope to find out whether the oxygen in CO2 comes from sugar or oxygen gas?
Animals get energy through a sequence of chemical reactions in which sugar (C6H12O6) and oxygen gas (O2) are reactants. This process produces water (H2O) and carbon dioxide (CO2) as waste products. How might you use a radioactive isotope to find out whether oxygen in CO2 comes from sugar or oxygen gas?
Q2. After having a severe cold accompanied by nasal congestion, Jamila complained that she had a headache just above her eyes and that the right side of her face ached. What specific bony structures most likely became infected by the bacteria or viruses causing the cold?