The class of RNA molecules that carries genetic information from the nucleus to the cytoplasm for protein construction is messenger RNA (mRNA).

Here's why:

* mRNA is a copy of a gene's DNA sequence. It is transcribed from DNA in the nucleus.

* mRNA travels out of the nucleus. It then goes to the ribosomes in the cytoplasm, where protein synthesis occurs.

* mRNA acts as a template. The sequence of bases in mRNA determines the order of amino acids in a protein.

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