Final answer:
The CRISPR locus confers virus immunity, which is true. The CRISPR loci in bacteria and archaea are part of the prokaryotic adaptive immune system that protects against viral infections.
Step-by-step explanation:
CRISPR locus confers virus immunity. The statement is true. The CRISPR loci (clustered regularly interspaced short palindromic repeats) in bacteria and archaea are part of the prokaryotic adaptive immune system that provides protection against viral infections. When a viral DNA is encountered, the CRISPR-associated (cas) proteins produce RNA markers that target and cleave the viral DNA, preventing viral replication. This mechanism allows prokaryotes to remember and immunize against specific viral infections.