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Building a capsid from many copies of one protein is advantageous because it

  • A.makes the particle heavier
  • B.allows the virus to generate its own energy
  • C.prevents the host from recognising the virus
  • D.lets a small genome specify a large container

Answer: D

Encoding one subunit and repeating it costs far less genetic information than encoding a large unique shell, which matters when the genome is small. The symmetry of the icosahedron is what makes such repetition geometrically possible.

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