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.
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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.
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.
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 .
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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