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 …

Aug 3, 2023 · Deoxyribonucleic acid (DNA) is the heredity material found in humans and all living organisms. It is a double-stranded molecule and has a unique twisted helical structure.

Nov 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 …

Learning Objectives Identify the sugar, phosphate, nitrogenous base, 5' and 3' carbons in a nucleotide and the key difference between DNA and RNA. Explain the structure of the double helix, including …

The hydrogen bonds between DNA strands occur between specific pairs of nitrogenous bases: T only pairs with A, and C only pairs with G. This specificity comes from the shapes of the bases and their …

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 …

1. A molecule of DNA consists of two strands that form a double helix structure. DNA is a macromolecule consisting of two strands that twist around a common axis in a shape called a double …

DNA is a polymer made of nucleotide subunits. A nucleotide consists of 3 chemical groups; a sugar, a phosphate and a nitrogenous base (Fig. 1). In the case of DNA, the sugar is deoxyribose.

I. Primary structure of the molecule:covalent backbone and bases aside Phosphoric acid Sugar Nitrogenous bases II. Secondary and tertiary structures of the molecule -Three-dimentional …

May 23, 2025 · The molecular structure of DNA is a cornerstone of modern biology, revealing how genetic information is stored and transmitted within living organisms. The double helix, a twisted …