Apollon Bacteriology Study Set Exam

Apollon Bacteriology Study Set Exam
3. Capsules can be used for

a. complement fixation test

b. hemagglutination test

c. serotyping by swelling

d. precipitation test - Answer c. serotyping by swelling

4. To demonstrate capsules, grow the culture on media containing

a. antibiotics

b. milk

c. serum

d. b and c - Answer d. b and c

5. The Quellung test depends on the antigenic specificity of the

a. nucleus

b. cell wall

c. flagella

d. capsule - Answer d. capsule

6. Dark staining granules are called

a. spores

b. capsules

c. cysts

d. metachromatic - Answer d. metachromatic

7. Organisms that vary in size and shape are referred to as

a. psychrophilic

b. thermophilic

c. palisades

d. pleomorphic - Answer d. pleomorphic

,8. In the bacterial growth cycle, growth ceases because nutrients are exhausted or
toxic metabolic products have accumulated in the

a. stationary phase

b. logarithmic phase

c. lag phase

d. a and b - Answer a. stationary phase

9. Which genera of bacteria form spores?

a. Corynebacterium

b. Bacillus

c. Clostridium

d. b and c - Answer d. b and c

10. Bacteria that grow in the absence of atmospheric (free) oxygen and obtain oxygen
from oxygen-containing compounds are called

a. anaerobes

b. aerobes

c. capnophiles

d. aerotolerant - Answer a. anaerobes

11. The temperature at which bacteria grow best is known as

a. thermophilic

b. psychrophilic

c. optimum

d. mesophilic - Answer c. optimum

12. A slimy colony on blood agar medium indicates which of the following
characteristics may be present?

a. blood agar is too old

b. organism has a capsule

c. plate was incubated too long

d. plate was incubated at too high a temperature - Answer b. organism has a capsule

,13. On blood agar plates a small zone of alpha-hemolysis surrounded by a zone of
beta-hemolysis after refrigeration is known

a. gamma-hemolysis

b. beta-hemolysis

c. alpha-hemolysis

d. alpha-prime hemolysis - Answer d. alpha-prime hemolysis

14. When using fractional sterilization the sequence is

a. heating (kills vegetative bacteria)

b. incubation (spores germinate)

c. heating (kills remaining vegetative bacteria)

d. all of the above - Answer d. all of the above

15. What is the most effective method of sterilization

a. autoclave

b. dry heat oven

c. boiling

d. disinfection - Answer a. autoclave

16. Which of the following is used for quality control for the dry heat oven?

a. Bacillus subtilis

b. Bacillus stearothermophilus

c. Staphylococcus aureus

d. Salmonella typhi - Answer a. Bacillus subtilis

17. Which of the following filters can give 100% sterility?

a. Seitz

b. Millipore (0.22 um)

c. Millipore (0.5 um)

d. a and b - Answer b. Millipore (0.22 um)

18. Media that cannot be heated can be sterilized by

, a. filtration

b. chemical disinfectants

c. antiseptics

d. cannot be sterilized - Answer a. filtration

19. Which of the following is not a disinfectant?

a. phenol

b. 70% alcohol

c. quaternary ammonium (“quatsâ€)

d. 2% aqueous glutaraldehyde - Answer b. 70% alcohol

20. Iodophores are composed of iodine and

a. a phenolic compound

b. a detergent

c. 70% alcohol

d. 90 to 95% alcohol - Answer b. a detergent

21. Quaternary ammonium disinfectants are easily inactivated by

a. heat

b. Pseudomonas aeruginosa

c. organic material

d. tap water - Answer c. organic material

22. What is a term that describes a process or treatment that renders a medical device,
instrument, or environmental surface safe to handle?

a. decontamination

b. antisepsis

c. disinfectant

d. sterile - Answer a. decontamination

23. What color do gram positive bacteria stain?

a. purple