Process of Science?

Question

1. Animals obtain energy through a series 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 the oxygen in CO2 comes from sugar or oxygen gas?

Answer 1

attach the isotope to the water molecules and if the CO2 is positive for the isotope then you know......if it is negative then you knew it came from the glucose...