Is phosphoproteins biomolecule is a constituent of a cell membrane?

Nucleic acid certain protein cell membranes certain carbohydrates

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

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations