True about DNA structure
Purines are adenine and guanine & pyrimidines are uracil and cytosine
Waston and Crick discovered structure in 1973
Deoxyribose - phosphate backbone with bases stacked inside
Mainly consists of left handed helix
Deoxyribonucleic acid (DNA) stores information for the synthesis of specific proteins. DNA has deoxyribose as its sugar. DNA consists of a phosphate group, a sugar, and a nitrogenous base. The structure of DNA is a helical, double-stranded macromolecule with bases projecting into the interior of the molecule. These two strands are always complementary in sequence. One strand serves as a template for the formation of the other during DNA replication, a major source of inheritance. This unique feature of DNA provides a mechanism for the continuity of life. The structure of DNA was found by Rosalind Franklin when she used x-ray crystallography to study the genetic material. The x-ray photo she obtained revealed the physical structure of DNA as a helix. DNA has a double helix structure. The outer edges are formed by alternating deoxyribose sugar molecules and phosphate groups, which make up the sugar-phosphate backbone. The two strands run in opposite directions, one going in a 3' to 5' direction and the other going in a 5' to 3' direction. The nitrogenous bases are positioned inside the helix structure like "rungs on a ladder," due to the hydrophobic effect, and stabilized by hydrogen bonding.
Metabolism of nucleic acids