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
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A sequence variant of a gene is called a(n)
A) allele. B) mutation. C) nucleotide polymorphism. D) ribotype.
What happens first following a neuron stimulation?
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Scientists are now using an expanded definition of intelligence, beyond IQ, called
____________________. Fill in the blank(s) with the appropriate word(s).