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MCQs

Total Questions : 304 | Page 25 of 31 pages
Question 241. Which of the following does not grow in Sabouraud’s glucose agar media?
  1.    Histoplasma capsulatum
  2.    Coccidioides immitis
  3.    Sporothrix schenckii
  4.    Blastomyces dermatitidis
 Discuss Question
Answer: Option D. -> Blastomyces dermatitidis
Answer: (d).Blastomyces dermatitidis
Question 242. Animals that are routinely infected with a protozoan or parasite are termed as _______________
  1.    definitive host
  2.    intermediate host
  3.    reservoir host
  4.    parasitic host
 Discuss Question
Answer: Option C. -> reservoir host
Answer: (c).reservoir host
Question 243. 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
  1.    survive the acid pH of the stomach
  2.    secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine
  3.    survive within macrophages
  4.    activate T cells to proliferate and secrete cytokines
 Discuss Question
Answer: Option C. -> survive within macrophages
Answer: (c).survive within macrophages
Question 244. The "A" subunit of diphtheria toxin
  1.    binds host cell receptors found on heart cells
  2.    cause ADP ribosylation of a factor involved in protein synthesis
  3.    forms cAMP that leads to fluid accumulation
  4.    lysis macrophages with the release of cytokines
 Discuss Question
Answer: Option B. -> cause ADP ribosylation of a factor involved in protein synthesis
Answer: (b).cause ADP ribosylation of a factor involved in protein synthesis
Question 245. The agent responsible for causing mad cow disease is thought to be a
  1.    fungus
  2.    protozoan
  3.    prion
  4.    virus
 Discuss Question
Answer: Option C. -> prion
Answer: (c).prion
Question 246. Which is not a major defense mechanism in the stomach?
  1.    Proteolytic enzymes
  2.    Low pH
  3.    Dense normal flora
  4.    All of these
 Discuss Question
Answer: Option C. -> Dense normal flora
Answer: (c).Dense normal flora
Question 247. Which of these cytokines is also known under the name cachectin?
  1.    Interferon gamma
  2.    Interleukin 2
  3.    Tumor necrosis factor (TNF)
  4.    None of the above
 Discuss Question
Answer: Option C. -> Tumor necrosis factor (TNF)
Answer: (c).Tumor necrosis factor (TNF)
Question 248. Study of 'cancer' is known as
  1.    Cancer study
  2.    Oncology
  3.    Pathology
  4.    Physiology
 Discuss Question
Answer: Option B. -> Oncology
Answer: (b).Oncology
Question 249. Viral 'gastroenteritis' in young children is caused by
  1.    Echovirus
  2.    Rotavirus
  3.    Coxsackie virus
  4.    Rhinovirus
 Discuss Question
Answer: Option B. -> Rotavirus
Answer: (b).Rotavirus
Question 250. A protein containing partial with no detachable 'nucleic acid' are known as
  1.    Virion
  2.    Prions
  3.    Viroid
  4.    Proteins
 Discuss Question
Answer: Option B. -> Prions
Answer: (b).Prions

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