Although both humans and bacteria have ribosomes, streptomycin—which blocks ribosome function—does not harm a human who ingests it. Why?

Although both humans and bacteria have ribosomes, streptomycin—which blocks ribosome function—does not harm a human who ingests it. Why?

The answer is :

Human cells have ribosomes that do not bind streptomycin; only prokaryotic ribosomes are affected by this drug.