MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following haemolysins does not possess leucocidal activity? |
| A. | α haemolysin |
| B. | γ haemolysin |
| C. | β haemolysin |
| D. | δ haemolysin |
| Answer» D. δ haemolysin | |
| 2. |
food poisoning usually manifests itself following ingestion of contaminated food after |
| A. | 2-6 hours |
| B. | 8-12 hours |
| C. | 12-18 hours |
| D. | 18-36 hours |
| Answer» B. 8-12 hours | |
| 3. |
Which of the following does not cause lysis of human RBCs? |
| A. | β haemolysin |
| B. | γ haemolysin |
| C. | α haemolysin |
| D. | δ haemolysin |
| Answer» D. δ haemolysin | |
| 4. |
The toxin of that may result into scalded skin syndrome is |
| A. | Enterotoxin |
| B. | Leucocidin |
| C. | Epidermolytic toxin |
| D. | Haemolysin |
| Answer» D. Haemolysin | |
| 5. |
Most strains of indicate |
| A. | phosphatase production |
| B. | a golden-yellow pigment |
| C. | β-haemolysis on sheep blood agar |
| D. | all of the above |
| Answer» E. | |
| 6. |
Which of the following Staphylococcal haemolysins does not possess leucocidal activity? |
| A. | haemolysin |
| B. | haemolysin |
| C. | haemolysin |
| D. | haemolysin |
| Answer» D. haemolysin | |
| 7. |
Identify the bacteria which is oxidase-negative and catalase-positive? |
| A. | <i>Staphylococcus</i> |
| B. | <i>Streptococcus</i> |
| C. | <i>Neisseria</i> |
| D. | <i>Pseudomonas</i> |
| Answer» B. <i>Streptococcus</i> | |
| 8. |
The bacteria which is novobiocin resistant is |
| A. | <i>Staphylococcus aureus</i> |
| B. | <i>S epidermidis</i> |
| C. | <i>S saprophyticus</i> |
| D. | None of these |
| Answer» D. None of these | |
| 9. |
The bacteria which are inhibited on crystal violet (1:500,000) blood agar, is/are |
| A. | <i>Streptococci</i> |
| B. | <i>Staphylococci</i> |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» C. Both (a) and (b) | |
| 10. |
The genus/genera that belongs to the family Micrococcaceae is |
| A. | <i>Micrococcus</i> |
| B. | <i>Staphylococcus</i> |
| C. | <i>Planococcus</i> |
| D. | All of these |
| Answer» E. | |
| 11. |
The most common cause of cystitis (after Escherichia coli) in healthy sexually active women is |
| A. | <i>Staphylococcus saprophyticus</i> |
| B. | <i>Proteus mirabilis</i> |
| C. | <i>Pseudomonas aeruginosa</i> |
| D. | <i>Klebsiella pneumoniae</i> |
| Answer» B. <i>Proteus mirabilis</i> | |
| 12. |
Most strains of Staphylococcus aureus indicate |
| A. | phosphatase production |
| B. | a golden-yellow pigment |
| C. | -haemolysis on sheep blood agar |
| D. | all of the above |
| Answer» E. | |
| 13. |
Which of the following can be used to detect clumping factor? |
| A. | tube coagulase test |
| B. | slide coagulase test |
| C. | precipitation test |
| D. | none of these |
| Answer» C. precipitation test | |
| 14. |
Coagulase-reacting factor is necessary for |
| A. | slide coagulase test |
| B. | tube coagulase test |
| C. | precipitation test |
| D. | none of these |
| Answer» C. precipitation test | |
| 15. |
Bacteria which produces coagulase is |
| A. | <i>S epidermidis</i> |
| B. | <i>S saprophyticus</i> |
| C. | <i>S aureus</i> |
| D. | <i>S hominis</i> |
| Answer» D. <i>S hominis</i> | |
| 16. |
Staphylococcal food poisoning usually manifests itself following ingestion of contaminated food after |
| A. | 2-6 hours |
| B. | 8-12 hours |
| C. | 12-18 hours |
| D. | 18-36 hours |
| Answer» B. 8-12 hours | |
| 17. |
Which of the following Staphylococcal haemolysins does not cause lysis of human RBCs? |
| A. | haemolysin |
| B. | haemolysin |
| C. | haemolysin |
| D. | haemolysin |
| Answer» D. haemolysin | |
| 18. |
The toxin of Staphylococcus aureus that may result into scalded skin syndrome is |
| A. | Enterotoxin |
| B. | Leucocidin |
| C. | Epidermolytic toxin |
| D. | Haemolysin |
| Answer» D. Haemolysin | |
| 19. |
Protein A is found in cell wall of |
| A. | coagulase-negative |
| B. | <i>staphylococci</i> |
| C. | <i>Staphylococcus aureus</i> |
| D. | <i>Micrococci</i> |
| E. | none of these |
| Answer» C. <i>Staphylococcus aureus</i> | |
| 20. |
The bacteria which can ferment mannitol anaerobically is |
| A. | <i> Staphylococcus aureus</i> |
| B. | <i>S epidermidis</i> |
| C. | <i>S saprophyticus</i> |
| D. | None of these |
| Answer» B. <i>S epidermidis</i> | |