ADD LINK TO BIBLIOGRAPHY
http://www.marcusfalden.com/wp-content/uploads/2009/07/dna-double-helix.jpg
http://www.marcusfalden.com/wp-content/uploads/2009/07/dna-double-helix.jpg
Double Helix
In 1953 the molecular structure of the double helix was discovered by Francis Crick and James Watson. A double Helix is a three-dimensional structure of cellular DNA. It is the most common structure of DNA in which the two polynucleotide strands are anti-parallel and wound around each other with bases bonded with hydrogen.
A double helix is basically a DNA structure where two helices twist together, they're made up of two linear strands and in opposite directions held together through chemical bonds. The structure twists into a helix which is the three-dimensional spiral structure of the DNA.
A DNA molecule of the double helix is made up of two strands that twist to look like a ladder as they wind around each other. Each consists of a backbone consisting of switching groups of sugar (deoxyribose) and phosphate groups. Each sugar has a base connected to it. There our four bases, thymine, cytosine, and guanine.
A double helix is basically a DNA structure where two helices twist together, they're made up of two linear strands and in opposite directions held together through chemical bonds. The structure twists into a helix which is the three-dimensional spiral structure of the DNA.
A DNA molecule of the double helix is made up of two strands that twist to look like a ladder as they wind around each other. Each consists of a backbone consisting of switching groups of sugar (deoxyribose) and phosphate groups. Each sugar has a base connected to it. There our four bases, thymine, cytosine, and guanine.
The helix can be any length when fully stretched, some DNA molecules are as much as two inches long.