DNA Gyrase is a topoisomerase. There are several kinds

At the ends of DNA strands there is a section non-coding nucleotides that we call a telomere. The telomere is what gets shorter every time a cell d...

The DNA is first unwound at origins of replication and the displaced histone proteins move onto to other parts of the DNA that haven't been unwound...

Yep, that was a typo! I've fixed it now and it should be corrected on the site shortly. Thanks for noticing!

The key word is the "usually." The reaction won't occur with a mis-paired base in most cases. However, about 1 in 10^5 base pairs will involve an i...

Prokaryotes have DNA polymerases I, II, III, eukaryotes have alpha, delta, epsilon and such.

Great question! Yes, DNA polymerase II is involved in repair of damage that occurs outside the context of DNA replication, such as cross-links betw...

Helicase enzyme. It binds at replication initiation site and moves along DNA, in front of polymerase III, opening replication fork.

Most DNA exists as a double-stranded DNA in a double helix — the strands are held together by base pairs and we usually think of this as a single m...

I found this on Nature.com: “DNA is always synthesized in the 5'-to-3' direction, meaning that nucleotides are added only to the 3' end of the grow...