MCQOPTIONS
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MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Identification of Bacteria knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following are the routine diagnostic methods for the microbial examination of blood specimen collected from a patient who had symptoms such as fever and weakness for more than 2 days? |
| A. | Direct microscopic examination |
| B. | Culture media |
| C. | Serodiagnosis |
| D. | All of the above |
| Answer» E. | |
| 2. |
Select all the common specimens collected for the laboratory diagnosis of dermatophytes |
| A. | Nail clippings |
| B. | Skin scrapings |
| C. | Hair |
| D. | Urine |
| Answer» B. Skin scrapings | |
| 3. |
Select all the most common clinically important spore-forming bacteria |
| A. | Bacillus anthracis |
| B. | Aspergillus flavus |
| C. | Lactobacillus acidophilus |
| D. | Haemophilus influenzae |
| Answer» B. Aspergillus flavus | |
| 4. |
All of the following statements are correct about the common bacteriological media known as Sheep blood agar, Except |
| A. | It consists of 5% of sheep blood |
| B. | Used for the identification of common fastidious bacteria |
| C. | It helps in the isolation and identification of hemolytic bacteria |
| D. | Used as a selective media for the growth of Mycobacterium tuberculosis |
| Answer» E. | |
| 5. |
Which of the following media is used for the routine bacteriological isolation of Salmonella and Shigella spp? |
| A. | Xylose lysine deoxycholate agar |
| B. | Thiosulfate citrate bile salts agar |
| C. | Mannitol salt agar |
| D. | Bile esculin agar |
| Answer» B. Thiosulfate citrate bile salts agar | |
| 6. |
Which of the following selective media is used for the cultivation and isolation of Neisseria gonorrhoeae and N. meningitidis? |
| A. | Buffered charcoal- yeast extract agar |
| B. | Thayer martin agar |
| C. | Xylose lysine deoxycholate agar |
| D. | Bile esculin agar |
| Answer» C. Xylose lysine deoxycholate agar | |
| 7. |
Mannitol Salt agar consisting of high salt concentration is both selective and differential media used for the isolation of which of the following gram-positive cocci? |
| A. | Klebsiella spp |
| B. | Streptococcus spp |
| C. | Staphylococcus spp |
| D. | Pseudomonas spp |
| Answer» D. Pseudomonas spp | |
| 8. |
All of the statements are true about Corynebacterium spp, Except |
| A. | Requires selective media containing tellurite |
| B. | Gram-positive |
| C. | Colonies appear black or gray |
| D. | Motile |
| Answer» E. | |
| 9. |
Which of the following media is one of the important and common media for the proper isolation of cocci pathogens such as Haemophilus spp and Neisseria gonorrhoea? |
| A. | Potato dextrose agar |
| B. | Chocolate agar |
| C. | Nutrient agar |
| D. | Mac Conkey agar |
| Answer» C. Nutrient agar | |
| 10. |
MacConkey s agar is both Selective and Differential media that is used primarily for the isolation of gram-negative bacteria. It consists of ................which inhibits the growth of gram-positive bacteria. |
| A. | Blood |
| B. | Peptone |
| C. | Bile salts |
| D. | Tryptophan |
| Answer» D. Tryptophan | |
| 11. |
All of the following are lactose fermenting bacteria, except |
| A. | Klebsiella pneumoniae |
| B. | Escherichia coli |
| C. | Enterobacter aerogenes |
| D. | Pseudomonas aeruginosa |
| Answer» E. | |
| 12. |
Gram staining technique is used for the differentiation of gram-positive and gram-negative bacteria. What color do gram-negative bacteria show when observed under the microscope after the staining procedure? |
| A. | Blue |
| B. | Pink |
| C. | Purple |
| D. | Violet |
| Answer» C. Purple | |
| 13. |
All of the following are common bacteriological stains, Except: |
| A. | Bismarck brown |
| B. | Methylene blue |
| C. | Eosin |
| D. | Crystal violet |
| Answer» B. Methylene blue | |
| 14. |
Which of the following dye is commonly used for the Negative staining technique? |
| A. | Crystal violet |
| B. | India ink |
| C. | Methylene blue |
| D. | Iodine |
| Answer» C. Methylene blue | |
| 15. |
A bacteriological stain also known as the differential stain is used to identify acid-fast organisms, what is the name of the stain? |
| A. | Negative stain |
| B. | Gram stain |
| C. | Ziehl-Neelsen stain |
| D. | Schaeffer stain- Fulton stain |
| Answer» D. Schaeffer stain- Fulton stain | |
| 16. |
A Capsule is a....................layer lying outside the bacterial cell and can be found in both gram-positive and gram-negative bacteria |
| A. | Lipopolysaccharide layer |
| B. | Polysaccharide |
| C. | Phospholipid |
| D. | None of the Above |
| Answer» C. Phospholipid | |
| 17. |
The identification of bacteria by serologic tests is based on the presence of specific antigens. Which of the following bacterial components is least likely to contain useful antigens? |
| A. | Capsule |
| B. | Cell wall |
| C. | Flagella |
| D. | Ribosomes |
| Answer» E. | |
| 18. |
Which of the following organism of the Enterobacteriaceae family have the characteristics of swarming growth on culture media, produces urease enzyme, and important urinary tract pathogen? |
| A. | Proteus spp |
| B. | Salmonella spp |
| C. | Lactobacillus spp |
| D. | Klebsiella spp |
| Answer» B. Salmonella spp | |
| 19. |
............is a fungus that is a part of normal gut flora and also a common skin, a vaginal and oral pathogen |
| A. | Neisseria gonorrhoea |
| B. | Yersinia pestis |
| C. | Coccidiodes immitis |
| D. | Candida albicans |
| Answer» E. | |
| 20. |
All of the statements regarding Bacillus anthracis are true, Except |
| A. | The causative agent of smallpox |
| B. | Nonhemolytic colonies appear on Blood agar |
| C. | Commonly transmitted from animals to humans |
| D. | Endospore-forming bacteria |
| Answer» B. Nonhemolytic colonies appear on Blood agar | |
| 21. |
Which of the following bacteria is a part of the human gut and mouth flora that is also important in making some fermented dairy products? |
| A. | Candida albicans |
| B. | Lactobacillus acidophilus |
| C. | Staphylococcus aureus |
| D. | Micrococcus luteus |
| Answer» C. Staphylococcus aureus | |
| 22. |
Which of the following microbe grows well and shows hemolytic properties in the blood agar? |
| A. | Bacillus anthracis |
| B. | Proteus vulgaris |
| C. | Streptococcus pyogenes |
| D. | Staphylococcus epidermidis |
| Answer» D. Staphylococcus epidermidis | |
| 23. |
The biochemical test helps in the identification and classification of microorganisms, there are many different types of this test, which of the following tests show a negative result for Escherichia Coli? |
| A. | Lactose |
| B. | Indole |
| C. | Citrate |
| D. | Glucose |
| Answer» D. Glucose | |
| 24. |
Which of the given bacteria has flagella and shows a positive motility test? |
| A. | Staphylococcus aureus |
| B. | Yersinia pestis |
| C. | Klebsiella pneumoniae |
| D. | Proteus vulgaris |
| Answer» E. | |
| 25. |
................is a rod-shaped, gram-positive, non-spore-forming medically important virulent foodborne pathogen that can grow in raw meat and vegetables, unpasteurized milk, cheese. |
| A. | Bacillus cereus |
| B. | Listeria monocytogens |
| C. | Clostridium botulinum |
| D. | Lactobacillus acidophilus |
| Answer» C. Clostridium botulinum | |
| 26. |
The cultural characteristics of Clostridium perfringens are all of the given below, Except? |
| A. | Microaerophilic |
| B. | Spore-forming |
| C. | Lecithinase positive |
| D. | Stormy fermentation |
| Answer» B. Spore-forming | |
| 27. |
................is a gram-negative bacillus, encapsulated, lactose fermenter. show mucoid. It is also a part of the normal flora of the oral cavity, skin, and intestine. |
| A. | Pseudomonas aeruginosa |
| B. | Staphylococcus aureus |
| C. | Streptococcus pneumoniae |
| D. | Klebsiella pneumoniae |
| Answer» E. | |