Question

25. In the spore staining procedure, which stain is considered the counterstain

A. Acidic fuchsin

B. ​​​​​​​Crystal violet

C. Iodine

D. ​​​​​​​Malachite green

E. Safranin

31. Which test(s) for bacterial motility is not influenced by the effect Brownian motion

A. Hanging drop slide

B. Motility media (semisolid agar)

C. Wet mount

D. All of the above

E. B and C

32. In the motility media (semisolid agar) method for determining bacterial motility, cell growth is indicated by which color?

A. Bluish-green

B. Brown

C. Clear (no color)

D. Pinkish-red

E. Violet

Answer 1

25)ans E. Safranin is used because it counter strike to determining the regulating cells spores in 0.5 percent. In the end a proper semer would show the spores as grow for within either a red or pink colored cell.

31)ans.D all of the above. Brownian motion is the motion of particle induced by the row move of bacteria or colloids. In hanging drop and wet mount the the motion of the bacteria is real motion while in the Brownian motion it generally takes place between big particle the the bacteria. And motility medium has much more intensity of movement that's the bacteria is not even influenced by brownian moment.

32)ans.d .pinkish red. In the motility test the indicated by a different zone of the growth flow the line of inoculative and motion give it's pinkish color. The cell is colonised well with pink in color and covex smooth body.