Which antibiotics can not be inactivated by beta- lactamase produced by bacteria?
A. penicillin,
B. streptomycin,
C. vacomycin,
D. Cephalosporin.
查看答案
Which type of point mutation in chromosomal gene is less likely to alter pore proteins to prevent the entry of drug into cytoplasm.
A. silent mutation;
B. missense mutation,
C. nonsense mutation;
D. Frameshift insertion.
Which protein with mutations in its gene could not inducedrug resistance?
A. porin in the outer membrane;
B. P12 of 30S ribosome ,
C. β-unit of RNA polymerase ;
D. lipoprotein in cell wall.
Which mechanism will confer sulfonamide resistance in thebacteria?
A. Bacteria absorb folic acid from the environment;
Bacteria alter P12 of 30S ribosome ,
C. Bacteria with mutatedβ-unit of RNA polymerase ;
D. Bacteria produce beta-lactamases.
Which statement about efflux pumps of bacteria is not right?
An efflux pump is a membrane active protein.
B. An efflux pump works without consumption of ATP.
C. Efflux pumps can pump more than one type of antimicrobials out of a cell.
D. Efflux pumps can confer multi-drug resistance to bacteria.
微信支付 
支付宝支付