MCQs on Staining methods in diagnostic microbiology 1. What is the purpose of a decolorizing agent in the Gram staining process? a) To make the bacteria more visible under the microscope b) To stain the bacterial capsules c) To differentiate between Gram-positive and Gram-negative bacteria d) To enhance flagella visibility 2. Which of the following is the primary stain used in acid-fast staining to identify acid-fast bacteria? a) Crystal violet b) Carbol fuchsin red c) Malachite green d) Safranin 3. What is the purpose of negative staining method? a) To stain the background around the microorganisms b) To stain the bacterial cells c) To stain the capsule structure of the microoragnisms d) To stain the flagella of the microorganisms 4. Which of the following staining method is commonly used to used to visualize and study bacterial flag...