D. I think but I’m not 100% on that
Correct answer is A hope this helps
WBCs, also called leukocytes, are an important part of the immune system. These cells help fight infections by attacking bacteria, viruses, and germs that invade the body. White blood cells originate in the bone marrow but circulate throughout the bloodstream.
A protein that has many hydrophobic r-groups pointing to the outside of the protein would be found embedded within a membrane.
Some proteins are bound only to the membrane surface while others have one region buried within the membrane and domains on one or both sides of it. Domains within the membrane move molecules across the membrane.
