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  • Question
  • Each of the 3 virulence factors of Bacillus anthracis i.e. the capsule, edema toxin and lethal toxin can affect the activity of


  • Options
  • A. B cells
  • B. macrophages
  • C. ciliated epithelial cells
  • D. M cells

  • Correct Answer
  • macrophages 


  • Microorganisms and Disease problems


    Search Results


    • 1. Both Mycobacterium tuberculosis and Streptococcus pneumoniae

    • Options
    • A. are acquired by inhalation
    • B. have cell walls that contain a high content of mycolic acids
    • C. have polysaccharide capsules
    • D. stay in the lung and rarely, if ever, enter the bloodstream
    • Discuss
    • 2. Coxsackie virus B3, a subgroup of enteroviruses, commonly causes

    • Options
    • A. acute hemorrhagic conjunctivitis
    • B. muscular dystrophy
    • C. myocarditis
    • D. gastroenteritis
    • Discuss
    • 3. Which of the following disease is caused by DNA viruses?

    • Options
    • A. Poliomyelitis
    • B. Yellow fever
    • C. Measles
    • D. Small pox
    • Discuss
    • 4. Ropiness in bread is caused by

    • Options
    • A. Bacillus subtilis
    • B. A. niger
    • C. R. nigricans
    • D. P. expansum
    • Discuss
    • 5. Which of the following organism is found at the initial stages in the batter of Idli?

    • Options
    • A. Leuconostoc mesentroides
    • B. Aspergillus niger
    • C. Bacillus natio
    • D. None of these
    • Discuss
    • 6. The agent responsible for causing mad cow disease is thought to be a

    • Options
    • A. fungus
    • B. protozoan
    • C. prion
    • D. virus
    • Discuss
    • 7. An important host defense of human beings is a dense resident microbiota associated with

    • Options
    • A. lungs
    • B. bladder
    • C. uterus
    • D. vagina
    • Discuss
    • 8. Type III secretion systems are used to inject "effector" proteins directly into a host cell. Salmonella uses a type III secretion system to help the pathogen to

    • Options
    • A. survive the acid pH of the stomach
    • B. secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine
    • C. survive within macrophages
    • D. activate T cells to proliferate and secrete cytokines
    • Discuss
    • 9. The nature of the poliovirus gives for oral vaccination (satin vaccine) as part of the eradication programme is

    • Options
    • A. heat killed virus
    • B. live attenuated strains of all three immunological types
    • C. small dosage of wild-type live viruses
    • D. formalin-inactivated viruses
    • Discuss
    • 10. Which of the following disease is not caused by microbial protein toxin?

    • Options
    • A. Botulism
    • B. Diphtheria
    • C. Shigella dysentery
    • D. Tuberculosis
    • Discuss


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