2015 · Q18
Most antibiotics target bacterial parasites interfering with various factors of growth or metabolism such as
- 1synthesis of cell wall
- 2bacterial protein synthesis
- 3synthesis of nuclear membrane
- 4mitochondrial function
Select the correct answer using the code given below.
General KnowledgeBiology
- A1, 2 and 3
- B1 and 4
- C2 and 3 only
- D1 and 2 only
Explanation
Antibiotics exploit targets unique to bacteria: peptidoglycan cell-wall synthesis (penicillins, cephalosporins) and bacterial 70S ribosomes for protein synthesis (tetracyclines, macrolides) — so statements 1 and 2 are correct. But bacteria are prokaryotes: they possess no nuclear membrane and no mitochondria, making statements 3 and 4 biologically impossible. Hence 1 and 2 only.