Discussion
Telomeres are usually rich in which nucleotide?
Answer: B
Correct answer: Guanine
Telomeric repeats are G-rich on the strand running 5’→3’ towards the chromosome end - TTAGGG in vertebrates. The guanine runs let the single-stranded overhang fold into a G-quadruplex, which is part of how the end is protected from being read as a double-strand break.
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