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Which of the following is true of ribonucleic acid (RNA)?

It contains thymine.

It is copied from other RNA molecules.

It never leaves the nucleus of a eukaryotic cell.

There are three types of RNA: messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA).

1 answer

The correct statement about ribonucleic acid (RNA) from the options provided is:

There are three types of RNA: messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA).

The other statements are not true:

  • RNA does not contain thymine; instead, it contains uracil (U).
  • RNA is synthesized from DNA during transcription, not copied from other RNA molecules (though some RNA can be replicated in specific processes like viral replication).
  • In eukaryotic cells, RNA (especially mRNA) can leave the nucleus to be translated into proteins.