What role do spacers play in the CRISPR-CAS9 system found in many bacteria?
A) Destroying natural enemies
B) DNA repair
C) Increasing gene expression
D) Decreasing gene expression
E) Identification of natural enemies

Question

Quizplus · Accepted Answer

Spacers in the CRISPR-Cas9 system are short sequences of DNA derived from viruses or plasmids that have previously invaded the bacterium. These sequences serve as a genetic memory, helping the CRISPR system identify and target the DNA of these invaders if they attack again, thus playing a crucial role in the bacterial immune response.

What Role Do Spacers Play in the CRISPR-CAS9 System Found