A. What is a differential stain? How is it different from a simple stain?
B. What is the difference between Gram-positive and Gram-negative cell walls?
C. What is the purpose of crystal violet in the Gram's stain procedure?
D. What is the purpose of iodine in the Gram's stain procedure? What is a mordant?
E. What is the purpose of acetone-alcohol in the Gram's stain procedure?
F. What is the purpose of safranin in the Gram's stain procedure?
G. Why do Gram-positive cells stain purple?
H. Why do Gram-negative cells stain pink?
I. Which of the organisms stained Gram-negative?
J. Which of the organisms stained Gram-positive?