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!

Protein can be a
or an process, i.e., it may
be possible or impossible to make the
regain its original spatial
conformation.