MICROBIOLOGY: PRACTICE 3

SINGLE BEST OPTION SERIES

         INSTRUCTION: SELECT THE SINGLE BEST OPTION

1.         Viruses are the smallest known infectious agents known and are:
   a.       Small in size
   b.      Possess genome
   c.       Metabolically inert
   d.      All of the above
   e.      None of the above
   2.       The following characteristics are common to all parasites:
   a.       Alimentary canal
   b.      An insect intermediate host
   c.       An infective state
   d.      Diurnal periodicity
   e.      None of the above
   3.       The human major histocompatibility complex (MHC) class II molecules are expressed by:
   a.       All nucleated cells
   b.      All antigen presenting cells
   c.       Erythrocytes
   d.      All lymphocytes
   e.      All somatic antigens/cells
   4.       Long term carriage and shedding is most likely to occur after gastrointestinal infection with which of the following species?
   a.       Escherichia coli 0157: H7
   b.      Shigella dysenteriae
   c.       Salmonella typhi
   d.       Ebola virus
   e.      None of the above
   5.       Which statement regarding the epidemiology of candidiasis is correct?
   a.       Patients receiving bone marrow transplant are not at risk for systemic candidiasis
   b.      Patients with impaired or low numbers of neutrophils and monocytes are not at risk of systemic candidiasis
   c.       Patients with any form of diabetes have enhanced resistance to canidiasis
   d.      Patients with HIV/AIDS frequently develop mucocutaneous candidiasis such as thrush
   e.      Pregnancy lowers the risk of candida vaginitis
   6.       The protein coat, the outer shell of viral proteins that surrounds the genome in a virus particle is:
   a.       Capsid
   b.      Envelope
   c.       Virus
   d.      Symmetry
   e.      Nucleoprotein
   7.       Which of the following parasite is best associated with diurnal periodicity?
   a.      Onchocerca volvulus
   b.      Loa loa
   c.       Wuchereria bancrofti
   d.      Dinofilaria immitis
   e.      All of the above
   8.       The autoantibody to collagen basement membrane is associated with this autoimmune disease:
   a.       Uveitis
   b.      Good Pasteur syndrome
   c.       Mixed connective tissue disease (MCTD)
   d.      Systemic lupus erythematosus (SLE)
   e.      Pemphigus vulgaris
   9.       Which of the following is not generally considered a potential agent of bioterrorism and biologic warfare?
   a.       Botulinum toxin
   b.      Brucella species
   c.       Yersinia pestis
   d.      Streptococcus pyogenes
   e.       Bacillus anthracis
   10.   Enterococci can be distinguished from non-enterococci streptococci on the basis of the following except:
   a.       Gamma-haemolysis on blood agar
   b.      Esculin hydrolysis
   c.       Growth in 6.5% NaCl
   d.      Growth in the presence of bile
   e.      Gram stain morphology 
   
   
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