Into Which Gene of the CRISPR-Cas System are Fragments of Bacteriophage

Question

Into which gene of the CRISPR-Cas system are fragments of bacteriophage DNA inserted?
A) Crispr
B) tracr
C) Cas9
D) Cas1
E) Cas2

Accepted Answer

Fragments of bacteriophage DNA are inserted into the Crispr gene of the CRISPR-Cas system. This is where the genetic memory of previous viral attacks is stored.