In a strain of bacteria, a mutation changes the sequence of repeat 2 in the Crispr gene (see figure). How will this affect bacterial immunity?

A. The bacteria will have no defense against the first infection with any bacteriophage.
B. The bacteria will have adaptive immunity against second infection with bacteriophage A, C, and D, but not B.
C. The bacteria will have adaptive immunity against second infection with bacteriophage A, but not B, C, or D.
D. The bacteria not have adaptive immunity against any second infections.


Answer: B

Biology & Microbiology

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