🔍
The most important mechanism by which tetracycline antibiotics exert antimicrobial action is:
A. They chelate Ca2+ ions and alter
permeability of bacterial cell membrane
B. They bind to 30S ribosomes and inhibit
bacterial protein synthesis
C. They bind to 50S ribosomes and interfere
with translocation of the growing peptide
chain in the bacteria
D. They interfere with DNA mediated RNA synthesis in bacteria
0 like 0 dislike

1 Answer

B. They bind to 30S ribosomes and inhibit
bacterial protein synthesis
0 like 0 dislike

Related questions

Chloramphenicol inhibits bacterial protein synthesis by: A. Binding to 30S ribosome and inhibiting attachment of aminoacyl tRNA B. Binding to 50S ribosome and preventing peptide bond formation C. Binding to ... chain D. Binding to both 30S and 50S ribosome and inducing misreading of mRNA code
Answer : B. Binding to 50S ribosome and preventing peptide bond formation...

View solution
0 like 0 dislike
1 answer

Aminoglycoside antibiotics exert the following action(s) on sensitive bacteria: A. Induce synthesis of defective proteins B. Make bacterial cell membrane more leaky C. Augment their own carrier mediated entry into the bacteria D. All of the above
Answer : D. All of the above...

View solution
0 like 0 dislike
1 answer

The most probable mechanism of action of imidazole antifungal drugs is: A. They bind to ergosterol in fungal cell membrane and make it leaky B. They interfere with ergosterol synthesis by fungi C. They interfere with fungal mitosis D. They block oxidative phosphorylation in fungi
Answer : B. They interfere with ergosterol synthesis by fungi...

View solution
0 like 0 dislike
1 answer

Select the antibiotic which inhibits bacterial protein synthesis by interfering with translocation of elongating peptide chain from acceptor site back to the peptidyl site of the ribosome so that ... chain is prematurely terminated: A. Chloramphenicol B. Erythromycin C. Tetracycline D. Streptomycin
Answer : B. Erythromycin...

View solution
0 like 0 dislike
1 answer

Bactericidal action of aminoglycoside antibiotics is due to: A. Inhibition of bacterial protein synthesis B. Alteration of bacterial cell membrane permeability C. Damage to bacterial cell wall D. Inhibition of bacterial oxidative metabolism
Answer : B. Alteration of bacterial cell membrane permeability...

View solution
0 like 0 dislike
1 answer

50.5k questions

47.1k answers

240 comments

7.0k users