Answer:
Option D
Explanation:
Bits of DNA that are interspersed among these repeated sequences are called spacers. Regarding to bacteria, the spacers are taken from viruses that previously attacked the organism. They serve as a bank of memories, which enables bacteria to recognize the viruses and fight against future attacks.
In the case of the CRISPR system of bacteria, the space should be Option D. inactive viral RNA
It should be interpreted between the sequences that are repeated which we known as the spacers. With respect to bacteria, the spacers should be considered from viruses that should be attached the organism. It should be treated as the memories bank that enables the bacteria for recording the viruses and fight should be done against the attacks that to be done in future.
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