The common pathway in coagulation ends with

Works together in the synthesis, modification, packaging, and transport of lipids and proteins

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

What is the one part of the nucleotide  that differs among the other different nucle  tides?