Helix
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A helix is a shape like a cylindrical coil spring or the thread of a machine screw. It is a type of smooth skew curve with tangent lines at a constant angle to a fixed axis. Helices are important in b
(l-r) Tension, compression and torsion coil springs
A machine screw
Crystal structure of a folded molecular helix reported by Lehn et al.
A natural left-handed helix, made by a climber plant
Nucleic acid double helix
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In molecular biology, the double helix is the structure formed by double-stranded molecules of nucleic acids such as DNA. The double-helical structure of a nucleic acid complex arises as a consequence
Helix
…a type of smooth skew curve with tangent lines at a constant angle to a fixed axis. Helices are important in biology, as the DNA molecule is formed as two intertwined helices, and many proteins have helical substructures, known as alpha helices. The word helix comes from the Greek word ἕλιξ, "twisted, curved". A "filled-in…
Base pair geometries