A mutation changes the sequence of the Cas1 gene so that Cas1 protein is no longer produced. How will this affect bacterial immunity?
A. The bacteria not have adaptive immunity against any second infections.
B. The bacteria will have no defense against the first infection with any bacteriophage.
C. The bacteria will have normal defense against first and second infections with some bacteriophages, but will have no defense against others.
D. The bacteria will have normal ability to defend itself against first and second infections with any bacteriophage.
Ans:
A. The bacteria not have adaptive immunity against any second infections.
B. The bacteria will have no defense against the first infection with any bacteriophage.
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