dna definition
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Deoxyribonucleic acid DNA. Definition. noun. A double-stranded nucleic acid that contains the genetic information for cell growth, division, and function. Supplement. Structure: DNA is composed of two strands that twist together to form a helix.
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DNA DNA (deoxyribonucleic acid). A type of nucleic acid that constitutes the molecular basis of heredity. It is found principally in the nucleus of all cells where it forms part of the chromosome, or in the cytoplasm of cells lacking a nucleus, such as bacteria.It acts as the carrier of genetic information containing the instructions (code) to make proteins.NA (deoxyribonucleic acid). The abbreviation for deoxyribonucleic acid, the primary carrier of genetic information found in the chromosomes of almost all organisms.
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DNA Deoxyribonucleic acid (/diˌɒksiˌraɪbɵ.njuːˌkleɪ.ɨk ˈaesɪd/ ; ˈæSɪD) dna is a molecule that carries most of the genetic instructions used in the, development functioning and reproduction of all known living organisms and many. virusesell division is essential for an organism to grow, but, when a cell divides, it must replicate the DNA in its genome so that the two daughter cells have the same genetic information as their parent. The double-stranded structure of DNA provides a simple mechanism for DNA replication.
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nucleotide nu·cle·o·tide. Any of a group of organic compounds composed of one of several nitrogen bases linked to a sugar and a phosphate group. The nucleic acids DNA and RNA are made up of chains of nucleotides.See Note at DNA.ny of a group of molecules that, when linked together, form the building blocks of DNA or RNA: in DNA the group comprises a phosphate group, the bases adenine, cytosine, guanine, and thymine, and a pentose sugar; in RNA the thymine base is replaced by uracil.
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gene gene. A segment of DNA, occupying a specific place on a chromosome, that is the basic unit of heredity. Genes act by directing the synthesis of proteins, which are the main components of cells and are the catalysts of all cellular processes.ach gene is a specific segment of DNA, occupying a fixed place on a chromosome. Genes contain the chemical information needed to create different kinds of proteins.
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DNA Deoxyribonucleic acid (/diˈɒksiˌraɪboʊnjʊˌkliːɪk, -ˌkleɪɪk/ ( listen);[1] DNA) is a molecule that carries the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses.
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Understanding DNA Understanding DNA. DNA is the carrier of our genetic information, and is passed down from generation to generation. All of the cells in our bodies, except red blood cells, contain a copy of our DNA. At conception, a person receives DNA from both the father and mother. We each have 23 pairs of chromosomes.
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DNA DNA A. adenine T. thymine C. cytosine G. guanine DNA (dē′ĕn-ā′) n. A nucleic acid that carries the genetic information in cells and some viruses, consisting of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine.
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DNA DNA. DNA is the molecule that is the hereditary material in all living cells. Genes are made of DNA, and so is the genome itself. A gene consists of enough DNA to code for one protein, and a genome is simply the sum total of an organism's DNA. DNA is long and skinny, capable of contorting like a circus performer when it winds into chromosomes.
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- Deoxyribonucleic acid (/diˌɒksiˌraɪbɵ.njuːˌkleɪ.ɨk ˈaesɪd/ ; ˈæSɪD) dna is a molecule that carries most of the genetic instructions used in the, development functioning and reproduction of all known living organisms and many. viruses
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Definitions &Translations Deoxyribonucleic acid (DNA) is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses.Along with RNA and proteins, DNA is one of the three major macromolecules essential for all known forms of life.eoxyribonucleic acid (DNA) is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses.
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DNA replication Definition of DNA replication. DNA replication: A complex process whereby the 'parent' strands of DNA in the double helix are separated, and each one is copied to produce a new (daughter) strand. This process is said to be 'semiconservative' because one strand from each parent is conserved and remains intact after replication has taken place.
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- gene (jēn) A segment of DNA, occupying a specific place on a chromosome, that is the basic unit of heredity. Genes act by directing the synthesis of proteins, which are the main components of cells and are the catalysts of all cellular processes.
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DNA DNA. n. A nucleic acid that carries the genetic information in cells and some viruses, consisting of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine.oun. 1. DNA - (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information; DNA is the king of molecules. deoxyribonucleic acid, desoxyribonucleic acid.
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- Definition of mitochondrial DNA. : an extranuclear double-stranded DNA found exclusively in mitochondria that in most eukaryotes is a circular molecule and is maternally inherited —abbreviation mtDNA.
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gene : a specific sequence of nucleotides in DNA or RNA that is located usually on a chromosome and that is the functional unit of inheritance controlling the transmission and expression of one or more traits by specifying the structure of a particular polypeptide and especially a protein or controlling the function of other genetic material.
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DNA Definition and Structure DNA Definition. DNA is the acronym for deoxyribonucleic acid, usually 2'-deoxy-5'-ribonucleic acid. DNA is a molecular code used within cells to form proteins. DNA is considered a genetic blueprint for an organism because every cell in the body that contains DNA has these instructions, which enable the organism to grow, repair itself, and reproduce.
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What is DNA? Deoxyribonucleic acid (DNA) is a nucleic acid present in the cells of all living organisms. It is often referred to as the “building blocks of life,” since it encodes the genetic material that determines what an organism will develop into.
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Contents: DNA vs RNA Definition. A nucleic acid that contains the genetic instructions used in the development and functioning of all modern living organisms. DNA's genes are expressed, or manifested, through the proteins that its nucleotides produce with the help of RNA. The information found in DNA determines which traits are to be created, activated, or deactivated, while the various forms of RNA do the work.
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DNA DNA. deoxyribonucleic acid: an extremely long, double-stranded nucleic acid molecule arranged as a double helix that is the main constituent of the chromosome and that carries the genes as segments along its strands: found chiefly in the chromatin of cells and in many viruses.[1930–35].NA. n. 1. (Biochemistry) deoxyribonucleic acid; a nucleic acid that is the main constituent of the chromosomes of all organisms (except some viruses).
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Chromosome A chromosome is a single large macromolecule of DNA, and is the basic 'unit' of DNA in a cell. It is a very long, continuous piece of DNA (a single DNA molecule), which contains many genes, regulatory elements and other intervening nucleotide sequences. In some circumstances chromosome also refers to the DNA bound proteins which package and manage the DNA.
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DNA: Definition, Structure & Discovery Deoxyribonucleic acid or DNA is a molecule that contains the instructions an organism needs to develop, live and reproduce. These instructions are found inside every cell, and are passed down from parents to their children. DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.
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Deoxyribonucleic acid DNA. Definition. noun. A double-stranded nucleic acid that contains the genetic information for cell growth, division, and function. Supplement. Structure: DNA is composed of two strands that twist together to form a helix.Each strand consists of alternating phosphate (PO4) and pentose sugar (2-deoxyribose), and attached on the sugar is a nitrogenous base, which can be adenine, thymine, guanine, or cytosine.tructure: DNA is composed of two strands that twist together to form a helix. Each strand consists of alternating phosphate (PO4) and pentose sugar (2-deoxyribose), and attached on the sugar is a nitrogenous base, which can be adenine, thymine, guanine, or cytosine.
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Chromosome noun. 1  A linear strand of DNA and associated proteins in the nucleus of eukaryotic cells that carries the genes and functions in the transmission of hereditary information. 2  A circular strand of DNA in bacteria and archaea that contains the hereditary information necessary for cell life.
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DNA DNA. Short for deoxyribonucleic acid. The nucleic acid that is the genetic material determining the makeup of all living cells and many viruses. It consists of two strands of nucleotides linked together in a structure resembling a ladder twisted into a spiral.NA. deoxyribonucleic acid: an extremely long, double-stranded nucleic acid molecule arranged as a double helix that is the main constituent of the chromosome and that carries the genes as segments along its strands: found chiefly in the chromatin of cells and in many viruses. [1930–35].