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All of the following are true of antigen EXCEPT which one of the following?

  • A.They contain epitopes.
  • B.They will react with antibodies
  • C. They contain antigenic determinants
  • D.They contain paratopes

Answer: D

Correct answer: They contain paratopes

A paratope is the antigen-binding site of an antibody, so it belongs to the antibody, not to the antigen. The antigen carries epitopes, also called antigenic determinants - the two terms are synonyms, which is why two of the other options say the same thing - and it is those that the paratope binds.

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