In the CRISPR-Cas system,which component is responsible for the bacterial equivalent of "immune memory"?

Question

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The CRISPR locus is responsible for the bacterial equivalent of "immune memory". It contains short repeats of DNA sequences that are separated by unique spacer sequences. These spacers are derived from foreign DNA that the bacterium has encountered before, and they serve as a record of past infections. When the bacterium encounters the same foreign DNA again, the CRISPR locus produces RNA molecules that guide the Cas nuclease to target and destroy the invading DNA.

In the CRISPR-Cas System,which Component Is Responsible for the Bacterial