题目内容

Which is not the biochemical mechanisms of antibiotics-resistance?

A. Barriers formed to block accumulation of antibiotics in bacterial cells;
Bacteria produce enzymes which can break the structures of antibiotics;
C. The bacterial molecules surround the antibiotics of penetrating the cells;
D. Bacterial Ribosome protein mutated so that antibiotics can not bind them.

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Which molecule mutated or decreased at level will develop drug-resistance?

A. peptidoglycan,
B. hemolysin
C. Protein porin channels in outer membrane
D. M protein in the cell wall.

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Which mutation in the gene for the following molecule may not be responsible for antibiotics-resistance ?

A. β-unit of RNA polymerase,
B. lipoprotein
C. P12 of 30S subunit of ribosome
D. Protein porin channels in outer membrane .

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Which statements are associated with drug resistance?

A. The bacteria grow in the presence of a drug that can kill it.

B. Therapeutic concentration of the drug is lower than its MIC;

C. Therapeutic concentration of the drug is higher than its MIC;

D. No inhibition zone is found around the drug paper disk on diffusion susceptibility

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#includemain(){int a=-1,b=4,k;k=(a<=0)&&(!(b<=0));printf("%d",k);}运行结果为:

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