Question

why are eukaryotic cells unaffected by streptomycin and similar antibiotics?
○ eukaryotic cells have organelles called lysosomes that engulf and break down these types of antibiotics.
○ eukaryotic dna replication is not disrupted because these antibiotics do not disrupt the enzymes used to produ eukaryotic dna.
○ eukaryotic protein synthesis is not disrupted because these antibiotics do not disrupt eukaryotic ribosomal activ
○ eukaryotic cells are unaffected by these antibiotics because eukaryotic cells lack cell walls.
○ eukaryotic cell walls are unaffected by these antibiotics because the cell walls do not contain peptidoglycan.

Explanation:

Streptomycin targets prokaryotic ribosomes (70S) to inhibit protein synthesis. Eukaryotic ribosomes (80S) have different structures, so streptomycin does not affect their function, leaving eukaryotic protein synthesis undisturbed. Other options are incorrect: lysosomes do not specifically break down streptomycin, streptomycin does not target DNA replication, most eukaryotes lack cell walls (but this is not the reason for resistance), and eukaryotic cell walls (when present) do not contain peptidoglycan but streptomycin does not target cell walls.

Answer:

Eukaryotic protein synthesis is not disrupted because these antibiotics do not disrupt eukaryotic ribosomal activity