The following diagram explains the DNA structure representing the different parts of the DNA. DNA comprises a sugar-phosphate backbone and the nucleotide bases (guanine, cytosine, adenine and thymine).

2024年4月14日 · DNA is a molecule that contains the genetic material in most living organisms. Discover the diagram of DNA structure and learn its characteristics in this illustrative article.

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.

2022年3月17日 · 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 thymine). A DNA molecule is composed of two strands.

2024年10月17日 · Make sure you can name the different components of a DNA molecule (sugar-phosphate backbone, nucleotide, complementary base pairs, phosphodiester bonds, hydrogen bonds) and make sure you are able to locate these on a diagram.

2023年9月13日 · What is the DNA molecule. What does it stand for. Who discovered it. Where is it found. What is it made of. Learn its shape and functions with a diagram.

DNA is a macromolecule consisting of two strands that twist around a common axis in a shape called a double helix. The double helix looks like a twisted ladder—the rungs of the ladder are composed of pairs of nitrogenous bases (base pairs), and the sides of the ladder are made up of alternating sugar molecules and phosphate groups.

2024年10月3日 · Structure of a DNA Molecule: Extended Extended Tier Only. DNA, or deoxyribonucleic acid, is the molecule that contains the instructions for the growth and development of all organisms. It consists of two strands of DNA wound around each other in what is called a double helix

2025年1月22日 · DNA Nucleotides. The building blocks of nucleic acids are nucleotides. Nucleotides that compose DNA are called deoxyribonucleotides. The three components of a deoxyribonucleotide are a five-carbon sugar called deoxyribose, a phosphate group, and a nitrogenous base, a nitrogen-containing ring structure that is responsible for complementary …

Structure of DNA Molecule: (i) Phosphoric acid, (ii) Pentose sugar, and. (iii) Organic bases. The phosphoric acid (H 3 P0 4) is biologically called phosphate and it was discovered by Levene in 1910. Phosphoric acid (Fig. 10.1) has three reactive hydroxyl groups (—OH) of which two are involved in forming sugar phosphate backbone of both DNA and RNA.