Biology 9700 · AS & A Level · The immune system

The immune system — practice question

The events shown happen during the primary immune response to a particular pathogen. Which row indicates the correct order of these events?

  • A5, 1, 2, 4, 3
  • B2, 4, 3, 1, 5
  • C4, 2, 1, 5, 3
  • D4, 2, 3, 1, 5

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