STM312

A chromophore is a

• Dye

• Colour

• Negative stain

• Positive stain

What is used as a counterstain in both Gram's staining and endospore staining?

• Iodine

• Safranin

• Malachite green

• Crystal violet

Which staining technique is used for acid-fast bacteria like Mycobacterium tuberculosis?

• Ziehl-Neelsen staining

• Haematoxylin and Eosin staining

• Endospore staining

• Gram's staining

Which stain imparts a red color to the cytoplasm and its components in histopathological studies?

• Safranin

• Methylene blue

• Crystal violet

• Eosin

Which stain is used in Gram's staining along with iodine to color the bacterial cell wall in purple?

• Eosin

• Crystal violet

• Iodine

• Safranin

Which staining technique is used to find out the presence of endospores in bacteria?

• Ziehl-Neelsen staining

• Gram's staining

• Endospore staining

• Haematoxylin and Eosin staining

Which staining technique is utilized to identify bacteria based on their cell wall composition?

• Haematoxylin and Eosin staining

• Gram's staining

• Endospore staining

• Ziehl-Neelsen staining

What is the purpose of a mordant in staining?

• To dissolve cell membranes

• To increase specimen opacity

• To make the specimen stainable

• To create unstainable specimens

Which procedure involves treating the specimen with a surfactant that dissolves the cell membrane for easy staining?

• Permeabilisation

• Fixation

• Wet Mounting

• Mordanting

What is the purpose of staining in microbiology?

• To increase specimen opacity

• To blur microscopic details

• To highlight and contrast biological specimens

• To reduce specimen visibility