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

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

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

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

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

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

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

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