DNA: Obama unveils strategy against ISIS on eve of 9/11 US President Barack Obama unveiled his administration's strategy for military action against the Islamic State (ISIS) on the eve of the 13th anniversary of t... By: Zee News … Continue reading →

Arhiepiscopul Tomisului, audiat la DNA By: B1TVChannel … Continue reading →

DNA: Where is J K govt in the time of need? At a time when the state is battling one of the worst floods in decades, the otherwise camera friendly Jammu and Kashmir government seems to get flown away i... By: Zee News … Continue reading →

Garret rants about DNA and utopia Another short rants about various things I think on. By: Mr. GarretSidzaka … Continue reading →

DNA | Generosity Joel Edwards shares his story as we explore the idea of generosity. By: Church of the City … Continue reading →

HTC DNA video of Hover High drone Cell phone video clip of Hover High drone shooting over a sunflower field. By: Hover High Aerial Productions … Continue reading →

ACMP Submission Video - Change DNA By: Stephanie Gioia … Continue reading →

DNA,abbreviation of deoxyribonucleic acid, organic chemical of complex molecular structure that is found in all prokaryotic and eukaryotic cells and in many viruses. DNA codes genetic information for the transmission of inherited traits. A brief treatment of DNA follows. For full treatment, see genetics: DNA and the genetic code. The chemical DNA was first discovered in 1869, but its role in genetic inheritance was not demonstrated until 1943. In 1953 James Watson and Francis Crick determined that the structure of DNA is a double-helix polymer, a spiral consisting of two DNA strands wound around each other. Each strand is composed of a long chain of monomer nucleotides. The nucleotide of DNA consists of a deoxyribose sugar molecule to which is attached a phosphate group and one of four nitrogenous bases: two purines (adenine and guanine) and two pyrimidines (cytosine and thymine). The nucleotides are joined together by covalent bonds between the phosphate of one nucleotide and the sugar of the next, forming a phosphate-sugar backbone from which the nitrogenous bases protrude. One strand is held to another by hydrogen bonds between the bases; the sequencing of this bonding is specifici.e., adenine bonds only with thymine, and cytosine only with guanine. … Continue reading →