Best Times to Go to Florence, Italy. Avoid summers if you can, it's hot and packed with sweating tourists in July and August. That said, there's hardly a time you won't encounter tourists in Florence. If you must go in summer, make hotel reservations early.
Helical. Helical (adjective) is having a spiral form of many rounds. Helical can be a hairstyle curl, loop fold of a ribbon that serves as pony and a repeated dialogue of an actor that gives twist to the audience.
A structure that forms within the nucleus during DNA replication, created by helicases, that break the hydrogen bonds holding the two DNA strands together. The resulting structure has two branching prongs, each one made up of a single strand of DNA.