When hemoglobin is deoxygenated (left), the heme group adopts a domed configuration. When hemoglobin is oxygenated (right), the heme group adopts a planar configuration. As shown in the figure, the conformational change in the heme group causes the protein to change its conformation, as well
C. Milky Way should be capitalized because it's a proper title. Earth is tricky in the sense that sometimes it is capitalized and sometimes it is not. Here, it should be because its in relation to other planets.
