Some antibiotics work by binding to ribosomes.
Which statement explains why these antibiotics kill bacteria cells but do not kill most human cells?
1 )
mRNA in bacteria is formed in the cytoplasm from naked DNA.
2 )
The antibiotics cannot pass through human cell membranes.
3 )
The codes used for amino acids in bacteria are different from those used by humans.
The ribosomes of bacteria have a different structure from those of humans.
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