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13 de set. de 2023 · Learn about the definition, discovery, structure, and functions of DNA, the molecule that carries genetic information in all living organisms. See a labeled diagram of the double helix and its features, such as base pairing, grooves, and strands.
Each strand of DNA is a polynucleotide composed of units called nucleotides. A nucleotide has three components: a sugar molecule, a phosphate group, and a nitrogenous base. The sugar in DNA’s nucleotides is called deoxyribose—DNA is an abbreviation for deoxyribonucleic acid.
Learn how DNA is composed of two strands of nucleotides that are paired by complementary bases, forming a double helix. Compare the structure of DNA and RNA, and how DNA is arranged and packaged in the cell.
DNA encodes information through the order, or sequence, of the nucleotides along each strand. Each base—A, C, T, or G—can be considered as a letter in a four-letter alphabet that spells out biological messages in the chemical structure of the DNA.
- Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts, Peter Walter
- 2002
- 2002
- What Is The Structure of DNA?
- Who Discovered The Structure of DNA?
- DNA vs. RNA: What’s The difference?
- What Is DNA Replication?
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DNA molecules are polymers, which means they are large molecules made up of many smaller molecules. The small molecules that make up DNA are called nucleotides. Each nucleotide contains a phosphate group, a sugar molecule (called deoxyribose), and a nitrogenous base. There are four types of nitrogenous bases found in DNA molecules. These are: 1. Ad...
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 data. ...
DNA and RNA are very similar molecules. Both are types of nucleic acid, both contain genetic information, and both can be found in the nuclei of cells. The structure of RNA nucleotides are also similar to those of DNA; both contain a phosphate group, a sugar molecule, and a nitrogenous base. However, there are some key differences between DNA and R...
DNA replication is a process in which two identical DNA replicas are produced from a single DNA molecule. It is an essential part of cell division, which is necessary for the growth and repair of damaged tissues. DNA replication ensures that each new daughter cell receives a complete copy of the organism’s genetic information. This allows each new ...
Learn about the structure of DNA, the double helix, the nucleotides, the base pairs, and the discovery of DNA. See a diagram of the DNA molecule and compare it with RNA.
- Kate Latham
Learn about the chemical structure, function and properties of DNA, the molecule that carries genetic information for all living organisms and many viruses. See diagrams of the DNA double helix, its components and interactions with proteins and RNA.
19 de nov. de 2019 · DNA Is a Structure That Encodes Biological Information | Learn Science at Scitable. What do a human, a rose, and a bacterium have in common? Each of these things — along with every other...
