Pharmacy Practice MCQ » PHARMACAREERS

Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject Microbiology. Read following article for your reference.

Evaluation Of Bactericidal & Bacteriostatic » PHARMACAREERS

1. What is the primary function of bactericidal agents?

1. - a) Inhibit bacterial growth
  - b) Kill bacteria
  - c) Promote bacterial growth
  - d) Neutralize toxins
2. What is the primary function of bacteriostatic agents?
  - a) Inhibit bacterial growth
  - b) Kill bacteria
  - c) Promote bacterial growth
  - d) Neutralize toxins
3. Which test is commonly used to evaluate the bactericidal activity of a substance?
  - a) Kirby-Bauer disk diffusion test
  - b) Minimum inhibitory concentration (MIC) test
  - c) Time-kill assay
  - d) Polymerase chain reaction (PCR)
4. What is the Minimum Inhibitory Concentration (MIC)?
  - a) The highest concentration of a drug that kills bacteria
  - b) The lowest concentration of a drug that inhibits bacterial growth
  - c) The highest concentration of a drug that inhibits bacterial growth
  - d) The lowest concentration of a drug that kills bacteria
5. What is the Minimum Bactericidal Concentration (MBC)?
  - a) The highest concentration of a drug that kills bacteria
  - b) The lowest concentration of a drug that inhibits bacterial growth
  - c) The highest concentration of a drug that inhibits bacterial growth
  - d) The lowest concentration of a drug that kills bacteria
6. Which of the following methods can determine whether an agent is bactericidal or bacteriostatic?
  - a) Kirby-Bauer disk diffusion test
  - b) Minimum inhibitory concentration (MIC) test
  - c) Time-kill assay
  - d) Broth dilution test
7. What does a bactericidal agent do to bacterial cells?
  - a) Inhibits their growth
  - b) Kills them
  - c) Allows them to replicate
  - d) Neutralizes their toxins
8. What is a common characteristic of bacteriostatic agents?
  - a) They kill bacteria instantly
  - b) They inhibit bacterial growth
  - c) They promote bacterial growth
  - d) They neutralize bacterial toxins
9. In a time-kill assay, what is being measured?
  - a) The growth rate of bacteria
  - b) The time it takes for bacteria to die
  - c) The concentration of bacteria over time
  - d) The effectiveness of bacteriostatic agents
10. What result indicates a bactericidal effect in a time-kill assay?
  - a) No change in bacterial count
  - b) Reduction in bacterial count
  - c) Increase in bacterial count
  - d) Stabilization of bacterial count
11. Which agent is more likely to be used for sterilization purposes?
  - a) Bactericidal agent
  - b) Bacteriostatic agent
  - c) Both equally
  - d) Neither
12. Which agent is more likely to be used in a clinical setting to treat infections?
  - a) Bactericidal agent
  - b) Bacteriostatic agent
  - c) Both equally
  - d) Neither
13. What does the term ‘bactericidal’ specifically imply about the agent’s activity?
  - a) It stops bacteria from dividing
  - b) It kills bacteria
  - c) It promotes bacterial growth
  - d) It prevents bacterial adherence
14. What does the term ‘bacteriostatic’ specifically imply about the agent’s activity?
  - a) It kills bacteria
  - b) It inhibits bacterial growth
  - c) It promotes bacterial growth
  - d) It prevents bacterial adherence
15. Which test involves measuring the optical density of a bacterial culture to evaluate the effect of an antimicrobial agent?
  - a) Kirby-Bauer disk diffusion test
  - b) Broth dilution test
  - c) Time-kill assay
  - d) Spectrophotometry
16. Why is the MIC test important in evaluating antimicrobial agents?
  - a) It determines the lowest concentration needed to kill bacteria
  - b) It determines the lowest concentration needed to inhibit bacterial growth
  - c) It determines the time it takes for bacteria to die
  - d) It measures the optical density of a bacterial culture
17. What does a clear zone around an antibiotic disk in the Kirby-Bauer test indicate?
  - a) Bacterial growth
  - b) Bacterial inhibition
  - c) Bacterial resistance
  - d) Bacterial adherence
18. Which agent would be preferred in treating a life-threatening infection where the immune system is compromised?
  - a) Bactericidal agent
  - b) Bacteriostatic agent
  - c) Both equally
  - d) Neither
19. How can the effectiveness of a bactericidal agent be confirmed after treatment?
  - a) By measuring the growth rate of bacteria
  - b) By counting the number of surviving bacteria
  - c) By observing bacterial adherence
  - d) By assessing bacterial metabolic activity
20. Which test can be used to differentiate between bactericidal and bacteriostatic effects?
  - a) Kirby-Bauer disk diffusion test
  - b) Time-kill assay
  - c) MIC test
  - d) Spectrophotometry
21. What is the significance of the MBC in evaluating an antimicrobial agent?
  - a) It helps determine the lowest concentration needed to inhibit bacterial growth
  - b) It helps determine the lowest concentration needed to kill bacteria
  - c) It measures the time required to kill bacteria
  - d) It assesses bacterial metabolic activity
22. Which type of agent is more likely to be used in a situation where the patient has a strong immune response?
  - a) Bactericidal agent
  - b) Bacteriostatic agent
  - c) Both equally
  - d) Neither
23. What does a reduction in colony-forming units (CFUs) indicate in a time-kill assay?
  - a) Bacterial growth
  - b) Bacterial adherence
  - c) Bactericidal activity
  - d) Bacterial resistance
24. Which agent relies on the host’s immune system to eliminate the bacteria after inhibition of growth?
  - a) Bactericidal agent
  - b) Bacteriostatic agent
  - c) Both equally
  - d) Neither
25. What is the significance of a time-kill curve in evaluating antimicrobial agents?
  - a) It shows the time required to kill bacteria
  - b) It shows the concentration required to inhibit bacterial growth
  - c) It shows the rate of bacterial resistance
  - d) It shows the bacterial adherence rate
26. Which agent is more suitable for use in disinfectants and sterilization processes?
  - a) Bactericidal agent
  - b) Bacteriostatic agent
  - c) Both equally
  - d) Neither
27. How does the presence of biofilm affect the efficacy of bactericidal agents?
  - a) It enhances the efficacy
  - b) It has no effect
  - c) It reduces the efficacy
  - d) It neutralizes the agent
28. What is a potential disadvantage of using bacteriostatic agents?
  - a) They kill bacteria instantly
  - b) They require the host’s immune system to clear the infection
  - c) They promote bacterial growth
  - d) They neutralize bacterial toxins
29. Which agent is more likely to cause the release of endotoxins upon bacterial cell lysis?
  - a) Bactericidal agent
  - b) Bacteriostatic agent
  - c) Both equally
  - d) Neither
30. Which test would you use to measure the effectiveness of an antimicrobial agent over a 24-hour period?
  - a) Kirby-Bauer disk diffusion test
  - b) Time-kill assay
  - c) MIC test
  - d) Broth dilution test

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