After reading the paragraphs below, answer the questions that follow.
Bloom syndrome is a rare disease characterized by growth deficiencies, genomic instability, and the early development of cancers. The BLM gene encodes the BLM protein, which when mutated may result in Bloom syndrome.
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?
◦ 3ʹ - GCTAGCTAAGCCCA - 5'
◦ 3ʹ - CGATCGATTCGGGT - 5'
◦ 5ʹ - GCTAGCTAAGCCCA - 3'
◦ 5ʹ - CGATCGATTCGGGT - 3'
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