Chemical structure of DNA; hydrogen bonds shown as dotted lines. Each end of the double helix has an exposed 5' phosphate on one strand and an exposed 3′ hydroxyl group (—OH) on the other.. DNA is a long polymer made from repeating units called nucleotides. [6] [7] The structure of DNA is dynamic along its length, being capable of coiling into tight loops and other shapes. [8]

Jan 9, 2021 · The double helix structure of DNA was first discovered in 1953 by James Watson (an American Biologist), Francis Crick (an English Physicist), and Rosalind Franklin (an English Chemist). Though only Watson and Crick were credited with the discovery of the double helix, they are believed to have made their discovery with the help of Franklin’s ...

Mar 28, 2025 · DNA is an organic chemical of complex molecular structure found in all prokaryotic and eukaryotic cells. It codes genetic information for the transmission of inherited traits. The structure of DNA was described in 1953, leading to further understanding of DNA replication and hereditary control of cellular activities.

The DNA structure can be thought of as a twisted ladder. This structure is described as a double-helix, as illustrated in the figure above. It is a nucleic acid, and all nucleic acids are made up of nucleotides.The DNA molecule is composed of units called

Sep 13, 2023 · Base Stacking: The flat, planar structure of the nitrogenous bases allows them to stack on top of each other within the double helix. This base-stacking interaction stabilizes the DNA molecule and contributes to its structure and shape. Major and Minor Grooves: The base pairing along the helix forms grooves on the surface of the DNA double ...

Mar 17, 2022 · The model of the double-helix structure of DNA was proposed by Watson and Crick. The DNA molecule is a polymer of nucleotides. Each nucleotide is composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group. There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and ...

Jun 12, 2023 · The remarkable structure of deoxyribonucleic acid (DNA), from the nucleotide up to the chromosome, plays a crucial role in its biological function. The ability of DNA to function as the material through which genetic information is stored and transmitted is a direct result of its elegant structure. In their seminal 1953 paper, Watson and Crick unveiled two aspects of …

Aug 3, 2023 · The standard structure of DNA that is commonly known, was described by Watson and Crick and is a right-handed double helix. The double-helical chains run antiparallel to each other, one running from 5’ to 3’ and another running from 3’ to 5’ and are joined together via complementary nitrogenous base pairing.

DNA is the molecule that holds the instructions for growth and development in every living thing. Its structure is described as a double-stranded helix held together by complementary base pairs.

May 30, 2024 · Learn all about DNA including its definition, structure, properties, types, and functions in this comprehensive guide. Discover the double helix structure of DNA and how it carries genetic information. Understand the different types of DNA and their unique properties. Get to know the functions of DNA in cell replication, genetic variation and inheritance, and how it plays a critical role in ...