For which of the following molecules does shape have an effect on its ability to carry oxygen? a. fat molecules b. dna c. origen d. hemoglobin

Correct D. Hemoglobin

The protein hemoglobin has four polypeptide chains, each one bound to a heme group. Each hemoglobin molecule can carry four oxygen molecules because of the presence of four heme groups. The binding of the first oxygen molecule modifies the shape of hemoglobin molecule slightly, this helps in increasing the oxygen binding capacity of the hemoglobin molecule. So, this alteration in shape increases the oxygen carrying capacity of the hemoglobin molecule.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.