Note, possible conception could be anytime between about one and five days after sex, depending on when you had sex in your fertile window in relation to ovulation. This is because sperm can live in the female reproductive tract for up to five days and the egg can survive for about 12-24 hours after ovulation.
What enzyme unwinds DNA? A: The powerful enzyme DNA helicase unwinds the double strands of DNA by breaking the bonds between each of the complementary bases. These bases are held together by strong hydrogen bonds, but in breaking these, DNA helicase creates two single-stranded DNA molecules. Continue Reading.
Possibly my favorite of the helicases, RecBCD is a helicase found in Escherichia coli which is one of the most processive (i.e. it unwinds the longest stretches of DNA) and fastest known helicases. One RecBCD unit can unwind up to 42 kilobases of DNA[1]! As you have read elsewhere, many helicases require the energy stored in ATP in order to split the double-helix. Well, RecBCD is one of those helicases. But the awesome thing about RecBCD is that it doesn't even use ATP at the splitting site!