Dna - history and structure - class-X

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Multiple Choice

Which one of the following pairs is not correctly matched?

  1. Plasmid - small piece of extrachromosomal DNA in bacteria.
  2. Interferon - an enzyme that helps in DNA replication.
  3. Cosmid - a vector for carrying large DNA fragments into host cells.
  4. Myeloma - tumour cells.
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