
What is positive and negative supercoiling? - Biology Stack Exchange
Feb 27, 2016 · Negative supercoiling is naturally prevalent because negative supercoiling prepares the molecule for processes that require separation of the DNA strands. For example, negative …
Over winding vs under winding of a DNA - Biology Stack Exchange
Oct 8, 2016 · DNA supercoiling refers to the over- or under-winding of a DNA strand. Source : DNA supercoil When a relaxed DNA is subjected to bends, or openings of DNA, over winding or …
Newest 'supercoiling' Questions - Biology Stack Exchange
Jul 19, 2021 · Supercoiling is a form of DNA in which the double helix is further twisted about itself, forming a tightly coiled structure. Learn more… Top users Synonyms 17 questions Newest Active More
molecular biology - A little help understanding DNA supercoiling ...
Aug 26, 2019 · Supercoiling just relieves the stress introduced after DNA gets further twisted in the first place, it relaxes the DNA by decreasing the twist back to normal (10.4bp per turn just like normal …
molecular biology - Reason behind formation of positive supercoils ...
When a twist is unwound without cutting the DNA strands or is removed by cutting the strand(s) and resealing, negative supercoils are introduced in the DNA. From Cell and Molecular Biology -Karp But
Does DNA helicase or topoisomerase actually "unwind" DNA?
Oct 8, 2016 · In other places in the book, it says the function of helicase is to separate the two strands of DNA, and topoisomerase "relieves the supercoiling" caused by the strand separation activity of …
Why do most organisms have negative supercoiled DNA?
Feb 25, 2015 · Therefore those organisms require a more stable form of their DNA which can be achieve by positive-supercoiling and/or high GC content. Now why do the vast majority of the …
Understanding DNA supercoiling - Biology Stack Exchange
While trying to understand DNA supercoiling, I came across these lines in the book Genetics by Ursula Goodenough : All natural DNA is superhelical. The axis of the duplex itself follows a helical
Why doesn't RNA polymerase just rotate? - Biology Stack Exchange
Jul 19, 2021 · I read A little help understanding DNA supercoiling , Understanding DNA supercoiling , and Why does underwinding create topological strain of DNA? , but there's still something I don't get. …
molecular genetics - Why is compensatory negative supercoiling ...
Dec 6, 2016 · Why is compensatory negative supercoiling generated in a positively supercoiling ccDNA? Ask Question Asked 9 years, 2 months ago Modified 8 years, 8 months ago