超星 - Quiz of lecture 1

单选题

Which pathogen of the following infectious disesses belong to the group of accelular microorganism?

A. syphilis
B. gonorrhea
C. acquired immunodefiency sydromes
D. invasive pulmonary aspergillosis

单选题

Which one is not the property of microorganism?

A. simple in structure
B. tiny in size
C. all types microorganism have cell stucture;
D. They are only observed by light microscope or elctronic microscope

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单选题

Which cellular structure is important in classifying a bacterial species asGram positive or Gram negative?

A. flagella
B. cell wall
C. cell membrane
DNA sequence in chromosome

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单选题

Which of the following method is right about Gram stain?

A. Crystal violet stain – iodine fixation--- alcohol destain – safranine restain.
B. Crystal violet stain – alcohol destain --- safranine restain -- iodine fixation.
C. Iodine stain –Crystal violet fixation--- alcohol destain – safranine restain.
D. Safranine stain – iodine fixation--- alcohol destain –Crystal violet restain.

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单选题

Which one is not the component of peptidoglycan of Gram positive bacterium

A. Tetapeptide side chain
B. pentapeptide cross bridge
C. bisaccharide backbone
D. lipopolysaccharide

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