Double-stranded oligonucleotides A,B,C,D,and E are sitting in a hot tub discussing 5'-UUUUUUUUUUUUUUU-3', who isn't there. The thermostat breaks and the water starts heating without control. Who is the last to dissociate?
During mitosis, one copy of each chromosome must move to the daughter cells. But chromosomes are very long and the DNA can easily become tangled. Which of the enzymes listed below can untangle DNA?
Polina and Mahmoud are each holding the DNA ends of a small piece of chromatin (Picture - top) containing four nucleosomes. They gently pull the DNA and release the nucleosomes (Picture - bottom) but do not let the DNA ends rotate. Compared to the original, the released DNA is now