Suppose you perform a Gram stain of a mixed culture of Gram-positive and Gram-negative cells, and afterward you realize that you omitted the iodine step. What would you expect to see if you observed the slide under the microscope?
A) pink Gram-positive and pink Gram-negative cells B) purple Gram-positive and pink Gram-negative cells C) colourless Gram-positive and pink Gram-negative cells D) colourless Gram-positive and colourless Gram-negative cells