What is the name of the point where the two parietals articulate with the occipital bone?

Lambdoid suture

Explanation:

The parietal bones are two bones, located above the temporal, behind the frontal and in front of the occipital. The occipital is an odd bone of the skull, with important cranial joints and sutures. The lambdoid suture extends through the back of the head. Each parietal bone joins the occipital bone in the lambdoid suture, that is, the lambdoid suture is the joint in the back of the skull that connects the parietal bones with the occipital bone.

answer; ///(b) it is composed of four protein chains and four heme groups;