A specimen viewed using an electron microscope shows no surrounding membrane in the center of the cell. This area contains a single large DNA molecule. What type of cell would this be?​

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