DNA is DNA (abbreviated as DNA), which is composed of nitrogen containing base Deoxyribose phosphate.
In the DNA molecular structure, two polydeoxynucleotide chains are coiled around a common central axis, forming a double helix structure. The Deoxyribose phosphate chain is outside the spiral structure, and the base faces inside. Two polydeoxynucleotide chains complement each other in the opposite direction, forming a stable combination through hydrogen bonding between bases.
DNA (DNA) is a kind of nucleic acid that carries the genetic information necessary for the synthesis of RNA and protein in biological cells. It is an essential biological macromolecule for the development and normal operation of organisms. The sequence of nucleotide bases in DNA constitutes genetic information.
This genetic information can be transcribed to form RNA, and the mRNA in it can then be translated into peptides to form proteins. Before cell division, the process of DNA replication copies the genetic information, which avoids the loss of genetic information during the transformation between different cell generations. In Eukaryote, DNA exists in the structure called chromosome in the nucleus. In other organisms without a nucleus, DNA either exists in chromosomes or in other tissues (bacteria have single loop double stranded DNA molecules, while viruses have DNA or RNA genomes).
In chromosomes, Chromatin proteins such as histones, coexisting proteins, and coagulins hold DNA in an orderly structure. These structures guide the interaction between the Genetic code and the protein responsible for transcription, and help to control gene transcription.