Q: The heme parts of a hemoglobin molecule bind with what element?


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

Hemoglobin is an example of a transport protein in the blood. You can see how it works in Figure below . The heme parts of a hemoglobin molecule bind with oxygen. Each red blood cell has hundreds of hemoglobin molecules. This is how oxygen is carried in the blood to cells throughout the body.

 Choices:

- hydrogen

- carbon

- nitrogen

- oxygen


A:
oxygen