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English: Diagram shows nucleotides bound together, forming a sugar-phosphate backbone. A double stranded DNA molecule is shown, with hydrogen bonds shown to link the bases of both backbones in the middle.
The chemical structure of DNA is insufficient to understand the complexity of the 3D structures of DNA. In contrast, animated molecular models allow one to visually explore the three-dimensional (3D) structure of DNA. The DNA model shown (far right) is a space-filling, or CPK, model of the DNA double helix. Animated molecular models, such as ...
DNA_Diagram.png (336 × 192 pixels, file size: 29 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
At the time, "yeast nucleic acid" (RNA) was thought to occur only in plants, while "thymus nucleic acid" (DNA) only in animals. The latter was thought to be a tetramer, with the function of buffering cellular pH. [199] [200] In 1937, William Astbury produced the first X-ray diffraction patterns that showed that DNA had a regular structure. [201]
DNA structure and bases A-B-Z-DNA Side View. Tertiary structure refers to the locations of the atoms in three-dimensional space, taking into consideration geometrical and steric constraints. It is a higher order than the secondary structure, in which large-scale folding in a linear polymer occurs and the entire chain is folded into a specific 3 ...
Deoxyribonucleic acid (DNA) is a nucleic acid containing the genetic instructions used in the development and functioning of all known living organisms. The chemical DNA was discovered in 1869, but its role in genetic inheritance was not demonstrated until 1943. The DNA segments that carry this genetic information are called genes.
This nucleotide contains the five-carbon sugar deoxyribose (at center), a nucleobase called adenine (upper right), and one phosphate group (left). The deoxyribose sugar joined only to the nitrogenous base forms a Deoxyribonucleoside called deoxyadenosine, whereas the whole structure along with the phosphate group is a nucleotide, a constituent of DNA with the name deoxyadenosine monophosphate.
The following 30 pages use this file: 20th century in science; Chalcogen; Complementarity (molecular biology) DNA; Directionality (molecular biology) Francis Crick; Genetics; Genetics in fiction; Glossary of cellular and molecular biology (M–Z) History of chemistry; Introduction to viruses; Molecular models of DNA; Nucleic acid design ...
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