Answer and explanation

Correct answer: A. It carries the genetic code from the nucleus to the ribosomes

  1. Step 1: mRNA copies a gene and carries the message to the ribosomes.
Answer
It carries the genetic code from the nucleus to the ribosomes.
Why not the others: It carries amino acids to the ribosome, It forms the structure of the ribosome and It replicates DNA do not fit.

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