Which structure is commonly present in bacteria but absent from animal cells?
- A. Plasmid
- B. Plasma membrane
- C. Ribosomes
- D. Cytoplasm
Explanation
Plasmids are small circular DNA molecules that carry extra genes, often for antibiotic resistance, and are widely used as vectors in genetic engineering. Animal cells share the plasma membrane, ribosomes and cytoplasm with bacteria, so only the plasmid separates them.
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