A. It kills bacteria and spores
B. It kills all bacteria except thermoduric bacteria
C. It kills 95% of microorganisms
D. Tubercle bacilli are destroyed
✅ The correct answer is option It kills all bacteria except thermoduric bacteria.
Microbiology MCQs
412. The causative organism of syphilis is___________?
A. Borrelia burgolorferi
B. Chalamydia trachomatis
C. Leptospira interrogans
D. Treponema pallidum
✅ The correct answer is option Treponema pallidum.
413. The best sterilization method for a hand-piece is________________?
A. Ethylene oxide gas
B. dry heat
C. chemical vapour
D. All of the above
✅ The correct answer is option Ethylene oxide gas.
414. Bacterial spores are destroyed by_______________?
A. Boiling at 100°C
B. Disinfection by hypochlorite solution
C. Autoclave
D. Pasteurisation
✅ The correct answer is option Autoclave.
415. Nagglers reaction detects________________?
A. Coagulase
B. Hyaluronidase
C. Lecithinase
D. None of the above
✅ The correct answer is option Lecithinase.
416. Pseudohphae are seen in____________?
A. Alternaria
B. Aspergillus
C. Osporium
D. Candida albicans
✅ The correct answer is option Candida albicans.
417. The following are applicable to bacterial genoms except________________?
A. It is composed of DNA
B. It doe not contain histones
C. It is circular
D. Its DNA has both introns and extrons
✅ The correct answer is option Its DNA has both introns and extrons.
418. Which of the following have the capability to produce extra cellular polysaccharides______________?
A. Strep. Mutans
B. Strep. pyogenes
C. Peptostreptococcus
D. Enterococcus
✅ The correct answer is option Strep. Mutans.
419. All are true about legionella pneumophilia except______________?
A. Aquatic bodies are main habitat
B. It can replicate in amoeba
C. Urine test is a reliable method
D. Person to person transmission
✅ The correct answer is option Person to person transmission.
420. Virulence of Gonococcus is due to___________________?
A. Pili
B. Cell Membrane
C. Its intracellular location
D. Cytolytic enzymes
✅ The correct answer is option Pili.