Question

10 When stained with violet and red dye, gram-positive bacteria appear ----------
purple
red
green
black

11 Gram-negative bacteria appear_________________ when stained with violet and red dye.
blue
green
purple
red

12 Based on their cabon and energy sources, eubacteria are
autotrophic
heterotrophic
photoautotrophic
all of the options

Answer 1

10. purple - because peptidoglycan absorbs the purple dye
11. red - because their peptidoglycan layer is thin
12. all of the options