I need help once again!!

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from