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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …