The CRISPR Mechanism Helps Bacterial Cells Defend Themselves Against Foreign

question 5

Multiple Choice

The CRISPR mechanism helps bacterial cells defend themselves against foreign DNA. Put the following CRISPR events in order, from first to last.
-2

• A) Foreign DNA enters cell for first time
• B) Protospacers are generated by Cas
• C) Foreign DNA is incorporated into CRISPR array
• D) CRISPR sequence is transcribed
• E) CRISPR RNA is fragmented
• F) sRNA targets foreign DNA for destruction

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