Q: What does hemoglobin in blood carry to the cells?


Read this paragraph and choose the correct option from the provided answers:

Figure 39.19 The protein inside (a) red blood cells that carries oxygen to cells and carbon dioxide to the lungs is (b) hemoglobin. Hemoglobin is made up of four symmetrical subunits and four heme groups. Iron associated with the heme binds oxygen. It is the iron in hemoglobin that gives blood its red color.

 Choices:

- methane

- carbon dioxide

- nitrogen

- oxygen


A:
oxygen