This document contains a 14-question microbiology quiz covering topics like bacterial morphology, structures, growth characteristics, and identification of common pathogens. The questions test knowledge of Gram staining results, bacterial forms like cocci and bacilli, cell wall structures, oxygen requirements, locomotion structures like flagella, and identification of likely bacterial causes of pneumonia, wound infections and more.

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