题目内容

Which group of bacteria can not grow in the presence of oxygen?

A. Obligate anaerobe;
B. obligate aerobe;
C. Microaerophiles
D. facultative anaerobe;

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Which enzyme present in the obligate anaerobe can catablize biochemical reaction inthe cells without oxygen?

A. superoxide dismutase ,
B. Catalase
C. peroxidase
D. RNA polymerase,

Which two byproducts of bacterial metabolism in presence of oxygencould kill obligate anaerobe ?

A. H2O2 + O2-
B. CO2+O2
CO2+H2
D. H2+O2

Which one of the following groups do the medical pathogensbelong to ?

A. Psychrophiles;
B. Mesophiles;
C. Thermophiles;
D. Hyperthermophiles.

From which bacteria of the following groups was the DNA polymerase purified to be applied in PCR?

A. Psychrophiles
B. Mesophiles;
C. Thermophiles;
D. Hyperthermophiles;