The nucleic acid that translates the genetic code contained within a cell is RNA (ribonucleic acid).

Here's why:

* DNA (deoxyribonucleic acid) holds the genetic code, but it's not directly involved in protein synthesis. It acts as a blueprint.

* RNA is a messenger molecule that copies the genetic code from DNA and carries it to the ribosomes, the protein-making machinery of the cell.

The process:

1. Transcription: DNA is transcribed into messenger RNA (mRNA).

2. Translation: mRNA is translated by ribosomes, using the genetic code to assemble amino acids into proteins.

So, while DNA contains the genetic code, RNA is the active player in translating it into functional proteins.