You Are Examining the DNA Profile of an Unknown Pathogen

Multiple Choice

You are examining the DNA profile of an unknown pathogen. The pathogen's DNA has been digested with EcoRI restriction enzyme. There are 7 bands on DNA on the gel. Which of the following is NOT True?

A) The original piece of DNA has seven EcoRI restriction sites.
B) The original piece of DNA has six EcoRI restriction sites.
C) The DNA has not been completely restricted.
D) The restriction enzyme has been denatured.
E) The restriction enzyme EcoRI was isolated from E. coli.