2. Eukaryotic mitochondria consume exactly how many substrate molecules, in their production of six carbon dioxide molecules and twelve water molecules, during aerobic respiration?
A. one C6H12O6 molecule, six H2O molecules, and six O2 molecules are consumed
B. twelve C6H12O6 molecules, six H2O molecules, and three CO2 molecules are consumed
C. six H2O molecules and twelve CO2 molecules are consumed
D. six C6H12O6 molecules, three H2O molecules, and six CO2 molecules are consumed
E. twelve H2O molecules and six O2 molecules are consumed