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举一反三
【单选题】Mycoplasmas, rickettsiae, and chlamydiae are
A.
types of fungi
B.
small bacteria
C.
species of protozoa
D.
forms of viruses
【判断题】Mycoplasmas are organisms without cell walls, and can easily revert to walled organisms.
A.
正确
B.
错误
【单选题】The wall-less mycoplasmas are considered to be related to gram positive bacteria. Which of the following would provide the most compelling evidence for this?
A.
They share common rRNA sequences.
B.
Some gram-positive bacteria and some mycoplasmas produce catalase.
C.
Both groups are prokaryotic.
D.
Some gram-positive bacteria and some mycoplasmas have coccus-shaped cells.
E.
Both groups contain human pathogens.
【单选题】A principal criterion for the diagnosis of meningitis due to Neisseria meningitidis is ( ).
A.
Observation of acid-fast rods in the spinal fluid.
B.
Gram-negative cocci, arranged in pairs, in the spinal fluid.
C.
Gram-negative rods in the spinal fluid.
D.
Observations of mycoplasmas in the spinal fluid.
E.
Gram-positive rods in the spinal fluid.
【简答题】Which of the following does not belong to Prokaryotic
microorganisms ?A. bacteria B. mycoplasmas C. chlamydiae D. prion
【单选题】Antibiotics are mostly produced by
A.
Chlamydia
B.
Bacteria
C.
Mycoplasmas
D.
Actinomycetes
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