Gram Staining
Trending Questions
Q. Gram' staining is a common technique used to differentiate two large groups of bacteria based on their different
- Cell membrane
- Extracellular matrix
- Cell wall
- All of the above
Q. While performing the Gram staining, what type of specimen is used?
- Live
- Heat-fixed
- Unstained
- Those sectioned into thin slices
Q. The dyes that are used in Gram's staining are
- Crystal violet and methylene blue
- Crystal violet and safranin
- Safranin and methylene blue
- Crystal violet and carbol fuchsin
Q. Gram staining technique is based on the fact that Gram-positive bacteria retain _______ stain that Gram-negative bacteria do not.
- Safranin
- Crystal violet
- Acetone
- Phenol
Q. In Gram staining technique, Gram-positive bacteria
- appear violet even after the addition of counterstain
- do not get stained by crystal violet
- take up the counterstain and appear orange-red
- lose crystal violet stain on washing with alcohol.
Q. In Gram staining technique, Gram-positive bacteria
- do not get stained by crystal violet
- appear violet even after the addition of counterstain
- take up the counterstain and appear orange-red
- lose crystal violet stain on washing with alcohol.
Q. In Gram staining technique, Gram-positive bacteria
- do not get stained by crystal violet
- appear violet even after the addition of counterstain
- take up the counterstain and appear orange-red
- lose crystal violet stain on washing with alcohol.
Q. Teichoic acid is present in
- Gram +ve bacteria
- Gram -ve bacteria
- Spirochaete
- Actinomycetes
Q. What are Gram-Positive bacteria?
Q. During Gram's stain
- All bacteria whether Gram (+)ve or (-)ve, take crystal violet stain
- Only Gram +ve bacteria take crystal violet stain
- Only Gram (-)ve bacteria take crystal violet stain
- Gram (+)ve bacteria lose this stain after alcohol treatment and take red stain of safranin