★ CRISPR and Sickle-Cell Disease Quiz
What is the main function of the CRISPR–Cas9 genome editing system in exa-cel therapy?
A. To cut both strands of DNA
B. To guide the enzyme to the target stretch of DNA
C. To stitch the DNA strands back together
D. To disable the BCL11A gene
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How many participants were involved in the clinical trial of exa-cel?
A. 9
B. 19
C. 29
D. 39
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