Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

The genetic code a degenerate code
there are amino codified
by more one type of . It is
not system in which element is
codified only one codifying .

For example, the amino acid arginine is
codified by sixcodons: CGU, CGC, CGA,
CGG, AGA and AGG.