Biology 9700 · AS & A Level · Cells as the basic units of living organisms

Cells as the basic units of living organisms — practice question

In what way is a primary transcript altered to produce mRNA?

  • AIt becomes longer as exons are joined together.
  • BIt becomes shorter as exons are removed.
  • CIt becomes longer as introns are joined together.
  • DIt becomes shorter as introns are removed.

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