Bacterial protein synthesis inhibitors have selective toxicity because:
1. susceptible strains of bacteria are affected.
2. biochemical processes are the same.
3. human ribosomes are larger and denser than bacterial ribosomes.
4. antibacterial activity is broad-spectrum.
Correct Answer: 3
Rationale 1: Susceptible strains of bacteria are targeted by the drug's antibacterial activity.
Rationale 2: Biochemical processes that are the same would be targeted by the drug.
Rationale 3: Human ribosomes are larger and denser than bacterial ribosomes. As a result, human ribosomes are not targeted by the drug's antibacterial activity.
Rationale 4: The spectrum of an antibacterial drug describes the range of bacteria it is effective against.
Global Rationale: Human ribosomes are larger and denser than bacterial ribosomes. As a result, human ribosomes are not targeted by the drug's antibacterial activity. Susceptible strains of bacteria are targeted by the drug's antibacterial activity. Biochemical processes that are the same would be targeted by the drug. The spectrum of an antibacterial drug describes the range of bacteria it is effective against.
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