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