To detect whether or not a cell has a specific region of a gene, researchers add radioactively labeled DNA molecules that can bind to their complementary DNA sequences. To detect a mutant version of the BLM gene, researchers added the radioactive DNA

molecule 5' - GCTAGCTAAGCCCA - 3' to cells. What DNA sequence were the researchers trying to detect?

A) 5? - GCTAGCTAAGCCCA - 3'
B) 3? - GCTAGCTAAGCCCA - 5'
C) 5? - CGATCGATTCGGGT - 3'
D) 3? - CGATCGATTCGGGT - 5'


Answer: D

Biology & Microbiology

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