Question

what are the names of the two groups of bacteria resulting from the gram stain method?
a) gram - positive and gram - negative
b) gram - variable and gram - constant
c) gram - cocci and gram - rods
d) gram - visible and gram - invisible

Explanation:

The Gram stain method is a common technique in microbiology. Bacteria are classified based on their cell - wall properties. Gram - positive bacteria retain the crystal violet stain due to a thick peptidoglycan layer in their cell walls. Gram - negative bacteria have a thinner peptidoglycan layer and an outer membrane, so they do not retain the crystal violet stain after the decolorization step and take up the counter - stain (usually safranin).

Answer:

A. Gram - positive and Gram - negative