Sample Response: The mystery food sample did not test positive for protein using the Biuret indicator, so the sample can not be tofu, which is what Zack ate. Check all facts below that you included in your explanation.Zack ate tofu.Tofu contains a great deal of protein.The mystery food sample tested negative for protein.
B
Tofu contains a great deal of protein.C
The mystery food sample tested negative for protein.