MCQOPTIONS
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MCQOPTIONS
This section includes 21 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 has the ability to bind antibodies? |
| A. | Coagulase |
| B. | Streptokinase |
| C. | Protein A |
| D. | Hydrogen Peroxide |
| Answer» D. Hydrogen Peroxide | |
| 2. |
Hylauronidase enzyme is produced by which of the following organism? |
| A. | C. perfringens |
| B. | S. pyogenes |
| C. | S. aureus |
| D. | Mycoplasma |
| Answer» B. S. pyogenes | |
| 3. |
Which of the following toxin is a hemolysin? |
| A. | diphtheria toxin |
| B. | botulism toxin |
| C. | tetanus toxin |
| D. | streptolysin O |
| Answer» E. | |
| 4. |
Which of the following statement is wrong regarding the effects of cholera toxin? |
| A. | loss of fluid from the body |
| B. | pH of blood remains constant |
| C. | hemoconcentration |
| D. | bicarbonate ions are lost from blood |
| Answer» C. hemoconcentration | |
| 5. |
How many B subunits are present in cholera toxin? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» E. | |
| 6. |
Which toxin causes paralysis of muscles? |
| A. | Diphtheria toxin |
| B. | Botulinum toxin |
| C. | Tetanus toxin |
| D. | Cholera toxin |
| Answer» C. Tetanus toxin | |
| 7. |
WHICH_TOXIN_CAUSES_PARALYSIS_OF_MUSCLES??$ |
| A. | Diphtheria toxin |
| B. | Botulinum toxin |
| C. | Tetanus toxin |
| D. | Cholera toxin |
| Answer» C. Tetanus toxin | |
| 8. |
Which of the following statement is wrong regarding the effects of cholera toxin?$ |
| A. | loss of fluid from the body |
| B. | pH of blood remains constant |
| C. | hemoconcentration |
| D. | bicarbonate ions are lost from blood |
| Answer» C. hemoconcentration | |
| 9. |
How_many_B_subunits_are_present_in_cholera_toxin?$ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» E. | |
| 10. |
LT toxin is produced by _____________ |
| A. | S. aureus |
| B. | E.coli |
| C. | B. anthracis |
| D. | C. perfringens |
| Answer» C. B. anthracis | |
| 11. |
Which of the following has the ability to bind antibodies? |
| A. | Coagulase |
| B. | Streptokinase |
| C. | Protein A |
| D. | Hydrogen Peroxide |
| Answer» D. Hydrogen Peroxide | |
| 12. |
Hylauronidase enzyme is is produced by which of the following organism? |
| A. | C. perfringens |
| B. | S. pyogenes |
| C. | S. aureus |
| D. | Mycoplasma |
| Answer» B. S. pyogenes | |
| 13. |
Which_of_the_following_toxin_is_a_hemolysin? |
| A. | diphtheria toxin |
| B. | botulism toxin |
| C. | tetanus toxin |
| D. | streptolysin O |
| Answer» E. | |
| 14. |
Which amino acid is an inhibitory transmitter? |
| A. | alanine |
| B. | tyrosine |
| C. | glycine |
| D. | phenylalanine |
| Answer» D. phenylalanine | |
| 15. |
The B region of diphtheria toxin has the enzymatic activity. |
| A. | True |
| B. | False |
| Answer» C. | |
| 16. |
Which of the following is a plasmid-mediated toxin? |
| A. | diphtheria toxin |
| B. | botulism toxin |
| C. | tetanus toxin |
| D. | food-poisoning toxin |
| Answer» E. | |
| 17. |
Which type of toxin is tetanus toxin? |
| A. | enterotoxin |
| B. | neurotoxin |
| C. | cytotoxin |
| D. | endotoxin |
| Answer» C. cytotoxin | |
| 18. |
Exotoxins are heat-labile in nature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 19. |
What is the chemical nature of endotoxins? |
| A. | protein |
| B. | polysaccharide |
| C. | lipopolysaccharide |
| D. | lipid |
| Answer» D. lipid | |
| 20. |
For Clostridium botulinum type A toxin, 1 MLD for a mouse is ____________ |
| A. | 2.5 X 10<sup>-5</sup> µg |
| B. | 4 X 10<sup>-5</sup> µg |
| C. | 6 X 10<sup>-2</sup> µg |
| D. | 5 µg |
| Answer» B. 4 X 10<sup>-5</sup> ¬¨¬®¬¨¬µg | |
| 21. |
Which bacteria has an unusual capsule among the following? |
| A. | Haemophilus influenzae |
| B. | Klebsiella pneumoniae |
| C. | Streptococcus pneumoniae |
| D. | Bacillus anthracis |
| Answer» E. | |