A typical bacteriophage consists of
- A. a head containing nucleic acid attached to a protein tail with tail fibres
- B. an RNA core surrounded by a lipid envelope only
- C. a single infectious protein molecule
- D. DNA enclosed in a polysaccharide capsule
Explanation
The phage's icosahedral head packs the DNA, and the hollow tail with base plate and fibres anchors to the bacterium and injects the genome. Descriptions involving envelopes or capsules belong to animal viruses and bacteria instead.
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