microbiology

1. Medical Microbiology & Immunology
Unit
Basic medical sciences department
College of Medicine

2. 1- Streptococcus pneumonia is:
A. Gram positive bacilli
B. Gram negative cocci
C. Gram negative bacilli
D. Gram positive cocci arranged in pairs

3. 2-Spirochete is:
A. Staphylococcus
B. Bacillus
C. Treponema pallidum
D. Streptococci

4. 3-Teichoic acid is found in:
A. Gram positive bacteria
B. Gram negative bacteria
C. Fungi
D. Viruses

5. 4-Bacterial locomotion is accomplished by:
A. Fimbria
B. Flagella
C. Ribosomes
D. Cell membrane

6. 5-The cell wall deficient form of bacteria is:
A. Klebsiella pneumonia
B. Salmonella typhi
C. Mycoplasma
D. Staphylococcus

7. 6-Cell wall of gram negative bacteria is composed of:
A. Teichoic acids
B. Thin peptidoglycan
C. Thick peptidoglycan
D. Chitin

8. 7- A facultative anaerobic bacteria:
A. Only grow anaerobically
B. Can grow in low concentrations of oxygen
C. Can grow in the presence or absence of oxygen
D. Only grow in the presence of oxygen

9. 8-The percentage of CO 2 required by Capnophilic bacteria is:
A. 0.5 %
B. 5-10 %
C. 21%
D. 0 %

10. 9-The virus that infect bacteria is called:
A. Bacterial pathogen
B. Various
C. Bacteriophage
D. Virion

11. 10-Which of the following bacteria produce endopigment?
A. Staphylococcus aureus
B. Pseudomonas aeruginosa
C. Clostridium botulinum
D. Corynebacterium diphtheria

12. 11- Bacterial Cells are active and rapidly divided in
which stage of growth curve?
A.Lag phase
B.Stationary phase
C.Log phase
D.Decline phase

13. 12-Bacteria which need high temperature for growth
are called:
A. Thermophilic bacteria
B. Microaerophilic bacteria
C. Facultative anaerobic bacteria
D. Mycobacteria

14. 13- A 65-year-old man presents to his family physician with
fever, chest pain, and productive cough. Chest x-ray shows focal
lobar pneumonia. Gram stain of a sputum sample showed gram-
positive diplococci. Which of the following is the most likely
pathogen?
A. Streptococcus pyogenes
B. Streptococcus pneumonia
C. Staphylococcus aureus
D. E. coli

15. 14-A 67-year-old man, presents at an emergency department with open leg
fracture after car accident. He was admitted to surgical department, 3 days after
he suffered from fever, tender leg swelling oozing offensive discharge. Gram
stain of deep wound swab revealed Gram-positive, spore-forming bacilli.
Which of the following is the most likely pathogen?
A. Clostridium perfringens
B. Staphylococcus aureus
C. Neisseria meningitidis
D. Bacillus cereus