Microbiology MCQ//13

    61.  For disrupting viral DNA synthesis it is used:

a.      Acyclovir

b.      Nystatin

c.       Isoniazid

d.      Vancomycin

    62.  The best sterilizing agent is:

a.      40%alcohol

b.      70% alcohol

c.       90% alcohol

d.      All of the above

    63.  Polyenes bind with it to disrupt fungal membranes:

a.      Peptidoglycan

b.      Sterols

c.       Ergesterol

d.      None

 

    64.  Microbe digest host tissue directly by producing:

a.      Endotoxins

b.      Estotosins

c.       Virulence factors

d.      None

    65.  Micro- animal mutation is found on:

a.      The rumen of grazing animal

b.      In the human vagina

c.       The intestinal tract

d.      All of the above 

Microbiology MCQ //12

   56.  Protozoa are ecologically important as:

a.      Cellulose digester

b.      Primary producer

c.       Agents of eutrophication

d.      All of above

   57.  Trypanosoma can be controlled by:

a.      Vaccination

b.      Penicillin

c.       Vector elimination

d.      All of the above

   58.  Prions are

a.      Defective DNA pices

b.      Infective proteins

c.       DNA probe

d.      None

  

   59.  Burst size is:

a.      Size of the cell

b.      No. of bacterial cell infected

c.       No. of virions released per cell

d.      Size of engulfed bacteria

  

   60.  Viriod like RNA defective is:

a.      HIV

b.      Hepatitis delta

c.       Herpes

d.      measles 

Microbiology MCQ //11

   51.  Transformation requires the recipient cell to be:

a.      In the lag phase

b.      Competent

c.       Capable

d.      Actively replicating

   52.  The vaccine for Hepatitis B virus is obtained:

a.      From recombinant viruses

b.      From recombinant bacteria

c.       Directly from virus DNA

d.      From host antibodies

    53.  Molds produce asexual spores on structures termed:

a.      Mycelia

b.      Aerial hyphae

c.       Asci

d.      Basida

    54.  Fungal cell walls are composed of:

a.      Lignins

b.      Cellulose

c.       Chitin

d.      None

   55.  Relationship between lichens of mychorrhizae is:

a.      Pathogenic

b.      Mutalistic

c.       Parasitic

d.      saprophytic

Microbiology MCQ//10

   46.  Algae are always:

a.      Photosynthetic

b.      Blue-green

c.       Unicellular

d.      Eukaryotic

    47.  Which of the following doesn’t allow observation of living cells:

a.      Bright-field microscope

b.      Dark-field microscope

c.       Phase contrast microscope

d.      Fluorescence microscope

   48.  Minimal media must contains:

a.      A source of trace element

b.      Source of purine

c.       Source of pyrimidines

d.      NaCl

   49.  Enzymes that cleaves peptide bonds is called:

a.      Peptide bondase

b.      Protease

c.       Peptidase

d.      Aminoacidase

   50.  Genetic variation is accomplished in prokaryotes by all except:

a.      Mutation

b.      Sexual reproduction

c.       Conjugation

d.      transformation