Test Your Knowledge - Free MCQ PRACTICE
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A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. Which of the following conditions can be caused by Plesiomonas?
A. Septicaemia
B. Gastroenteritis
C. Cellulites
D. All of these

2. Vacuum packaged meats are spoiled by
A. B. thermosphacta
B. Lactobacilli
C. Both A and B
D. none of these

3. Pseudomonas aeruginosa can be diagnosed from the pigment, known as
A. Pyocyanin
B. Pyoverdin
C. Pyomelanin
D. Pyorubrin

4. Which of the following medium are used to differentiate the colonies of Vibrio cholerae and V parahaemolyticus?
A. Alkaline bile salt
B. Thiosulphate-citrate-bile-sucrose
C. MacConkey
D. All of the above

5. Catalase production is negative in which of the following?
A. Streptococcus
B. Salmonella
C. Proteus
D. Staphylococcus

6. Which of the following bacteria is associated with food poisoning due to consumption of sea fish?
A. Vibrio parahaemolyticus
B. V alginolyticus
C. V vulnificus
D. All of these

7. A bacterial food intoxication refers to
A. illness caused by presence of pathogens
B. food borne illness caused by the presence of a bacterial toxin formed in food
C. both A and B
D. none of the above

8. Eugonic growth on Lowenstein-Jensen medium is produced by
A. M bovis
B. Mycobacterium tuberculosis
C. Both A and B
D. None of the above

9. Lens antigens of the eye are
A. cross-reacting antigens
B. sequestrated antigens
C. neoantigens
D. none of these

10. Icosahedral viruses are generally
A. polio viruses
B. adeno viruses
C. both A and B
D. none of these

11. A person working in abattoir with pustules on hand which turned into ulcer. Which of the following would help best in diagnosis?
A. Polychrome Methylene Blue
B. Carbol fuschin
C. Acid Fast Stain
D. Calcoflour white

12. Which of the following genera is included in the family Bacteroi-daceae?
A. Bacteroides
B. Fusobacterium
C. Leptotrichia
D. All of these

13. __________is probably the most important characteristic for classification of viruses in eukaryotes.
A. Host preference
B. Morphology
C. Physical nature of virion constituents
D. Chemical nature of virion constituents

14. Who was the inventor of the Petri dish?
A. R.J. Petri, an assistant of R. Koch
B. A famous French cook
C. Italian glass blower from Petri, Italy
D. None of the above

15. The bacteria involved in the production of dental caries is/are
A. Streptococcus mutans
B. S sanguis
C. Both (a) and (b)
D. Streptococcus pyogenes

16. Grains spoiled by molds are a potential animal or human health hazard as well as a great economic loss. Which is/are the common species of molds in the spoilage of stored grains by molds?
A. Aspergillus
B. Penicillium
C. Fusarium
D. All of these

17. Xylose lysine deoxycholate (XLD) agar is better selective medium than the deoxycholate citrate agar (DCA) because
A. it is selective
B. it imparts better growth
C. it contains high salt concentration
D. it is less inhibitory to S. Dysentriae and S. flexneri

18. Chemical precipitation of phosphorus is
A. primary treatment
B. secondary treatment
C. tertiary treatment
D. both A and B

19. A musty or muddy odor of the fish is attributed to
A. the growth of Streptomyces species in the mud at the bottom of the body of water
B. the mud at the bottom of the body of water
C. the growth of Pseudomonas species in the mud at the bottom of the body of water
D. none of the above

20. Human pathogenic bacteria is/are
A. B pseudomallei
B. Burkholderia mallei
C. Pseudomonas aeruginosa
D. All of these

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