11. What is the colour of gram -postive bacteria on a gram staining?

A. Purple
B. Pink
C. Colourless
D. Green

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12. What is the colour of gram-negative bacteria on a gram staining?

A. Purple
B. Pink
C. Green
D. Colourless

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13. Which of the following is a primary stain for acid fast staining of mycobacteria?

A. Crystal violet
B. Carbol fuchsin
C. Geimsa
D. Methylene blue

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14. The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to

A. radiation
B. desiccation
C. both (a) and (b)
D. extreme temperatures

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15. Which of the following shows a positive urease test?

A. Proteus
B. Klebsiella
C. Both (a) and (b)
D. None of these

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