1.What does Streptococci look like under the microscope?
a.strings of rods
b.strings/chains of spheres
c.clusters of rods
d.grape-like clusters of spheres
2.What is the total magnification when you used he 40Xobjective?
a.400X
b.40X
c.4X
d.4000X
QUESTION 3
- What was the purpose of the streak plate method?
| a. | to count the number of bacteria in a culture |
| b. | to count the number of coliforms in a culture |
| c. | To isolate single colonies from a mixture of bacteria |
| d. | to show that bacteria are everywhere |
QUESTION 4
- The dye that gives Gram+ bacteria their color is
| a. | crystal violet |
| b. | safranin |
| c. | Iodine |
| d. | methylene blue |
- The dye that is retained by Gram- bacteria is
| a. | iodine |
| b. | Methylene blue |
| c. | Safranin |
| d. | Crystal violet |
QUESTION 6
- The counterstain used for the acid fast staining procedureis
| a. | carbolfuschin |
| b. | crystal violet |
| c. | methylene blue |
| d. | safranin |
QUESTION 7
- Which of the following is NOT a selective medium?
| a. | Blood agar |
| b. | Mannitol salt |
| c. | BGB |
| d. | Snyder's agar |
QUESTION 8
- Alpha hemolysis is
| a. | The complete lysis of red blood cells |
| b. | The complete lysis of bacteria |
| c. | The partial lysis of red blood cells |
| d. | No lysis of red blood cells |
QUESTION 9
- Amylase is an enzyme which breaks down
| a. | gelatin |
| b. | starch |
| c. | lactose |
| d. | glucose |
QUESTION 10
- A medium that supports the growth of a wide variety ofbacteria
| a. | synthetic medium |
| b. | selective medium |
| c. | nutrient medium |
| d. | differential medium |
