Ineed "asap"!which of the following describes a cell structure that a gram-negative bacterium has that a gram-positive bacteria does not have? a. an extra layer that is outside the peptidoglycan layer of the cell wall b. a membrane-bound mitochondrion in which energy for the cell is made c. an electrically charged sugar molecule that is attracted to sodium ions d. a membrane-enclosed nucleus in which dna is stored and protected