In molecular Biology, the term double helix[1] refers to the structure formed by double-stranded molecules of nucleic acids such as DNA and RNA. The double helical structure of a nucleic acid complex arises as a consequence of its secondary structure, and is a fundamental component in determining its tertiary structure. The term entered popular culture with the publication in 1968 of The Double Helix: A Personal Account of the Discovery of the Structure of DNA, by James Watson.
The DNA double helix is a spiral polymer of nucleic acids, held together by nucleotides which base pair together.[2] In B-DNA, the most common double helical structure, the double helix is right-handed with about 10-10.5 nucleotides per turn.[3] The double helix structure of DNA contains a major groove and minor groove, the major groove being wider than the minor groove.[2] Given the difference in widths of the major groove and minor groove, many proteins which bind to DNA do so through the wider major groove.[4]
10 Nucleotide bases per turn
Watson and Crick measured the width of helix and the spacing of the bases of the DNA. They built model of the double helix to conform their research as right.
DNA is a double helix made of two strands linked together with hydrogen bonds.
James Watson & Francis Crick were the ones who found out the double helix structure of the DNA molecule.
double helix
Double Helix
Nitrogen Bases.
double helix, twisted ladder, spiral staircase.
Watson and Crick found that if they paired double ringed nucleotides with a single-ringed nucleotides, the bases fit like a puzzle CHACHACHACHACHA
A double helix.
Watson and Crick measured the width of helix and the spacing of the bases of the DNA. They built model of the double helix to conform their research as right.
DNA is a double helix made of two strands linked together with hydrogen bonds.
James Watson & Francis Crick were the ones who found out the double helix structure of the DNA molecule.
Double Helix
double helix
they have found out the current DNA model in 1953
The double helix model became the accepted structure of DNA because it fit the experimental evidence, especially from X-ray crystallography of the DNA molecule.
Double helix ladder