A microbiologist isolated a mutant strain of E. coli that is extremely susceptible to bacteriophage infection, by a wide range of bacteriophages. Which of the following genes might she explore as a possible site of the mutation that results in this phenotype? (CS CSLO 3, CSLO 4) a gene that encodes a small nucleolar RNA a gene that encodes a Cas protein a gene that encodes a Piwi- interacting RNA a gene that encodes either a miRNA or a siRNA a sene that encodes an immune RNA.