Answer:
The hemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.
C6H12O6+6O2--->6CO2+6H2O+energy
Oxygen(O2) is used to break down glucose(C6H12O6) into energy so the answer is b
1. Is A
2 Is B
Because A and T in the DNA sequence goes together so they both have to have the same amount same goes for C and G
