Florence (Firenze) 10 day weather forecast, updated four times a day and shows the weather summary plus detailed sun, rain, snow, wind and temperature. The weather forecast extends out to 10 days showing information for morning, afternoon and overnight.
Definition of double helix. : a helix or spiral consisting of two strands in the surface of a cylinder that coil around its axis; especially : the structural arrangement of DNA in space that consists of paired polynucleotide strands stabilized by cross-links between purine and pyrimidine bases â compare alpha-helix, watson-crick model.
Double Helix of DNA The DNA structure is a double helix that â¢ consists of two strands of nucleotides that form a double helix structure like a spiral staircase. â¢ has hydrogen bonds between the bases AâT and GâC. â¢ has bases along one strand that complement the bases along the other.