Microbiology labs

0. What is a differential stain? How is it different from a simple stain?

0. What is the difference between Gram-positive and Gram-negative cell walls?

0. What is the purpose of crystal violet in the Gram’s stain procedure?

0. What is the purpose of iodine in the Gram’s stain procedure? What is a mordant?

0. What is the purpose of acetone-alcohol in the Gram’s stain procedure?

0. What is the purpose of safranin in the Gram’s stain procedure?

G. Why do Gram-positive cells stain purple?

1. Why do Gram-negative cells stain pink?

1. Which of the organisms stained Gram-negative?

1. Which of the organisms stained Gram-positive?