Answer:
Yes It contains protein. The purpose of putting the chemical in water and pure protein is to be able to have independent variables.
Step-by-step explanation:
The chemical contains protein because it turned purple and we know that when it was in pure protein it turned purple as well, but while in water it turned blue. The purpose of having it tested in both water and pure protein was to be able to know that if it was in protein or not it wouldn't be the same color, because then the experiment would be ruined.