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DNA
Genetics.Ģżdeoxyribonucleic acid: an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each other in a ladderlike arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanine, cytosine, and thymine: the genetic information of DNA is encoded in the sequence of the bases and is transcribed as the strands unwind and replicate.
the set of nongenetic traits, qualities, or features that characterize a person or thing.
Humility is just not in her DNA.
DNA
noun
deoxyribonucleic acid; a nucleic acid that is the main constituent of the chromosomes of all organisms (except some viruses). The DNA molecule consists of two polynucleotide chains in the form of a double helix, containing phosphate and the sugar deoxyribose and linked by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine. DNA is self-replicating, plays a central role in protein synthesis, and is responsible for the transmission of hereditary characteristics from parents to offspring See also genetic code
abbreviation
did not attend
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 long strands of nucleotides linked together in a structure resembling a ladder twisted into a spiral. In eukaryotic cells, the DNA is contained in the nucleus (where it is bound to proteins known as histones) and in mitochondria and chloroplasts. In the presence of the enzyme DNA polymerase and appropriate nucleotides, DNA can replicate itself. DNA also serves as a template for the synthesis of RNA in the presence of RNA polymerase.
DNA
The molecule that carries genetic information in all living systems (see genetic code). The DNA molecule is formed in the shape of a double helix from a great number of smaller molecules (see nucleotides). The workings of the DNA molecule provide the most fundamental explanation of the laws of genetics. DNA acts in three important way. First, when a cell divides, the DNA uncoils, and each strand creates a new partner from the surrounding material ā a process called replication. The two cells that result from the cell division have the same DNA as the original (see mitosis). Second, in sexual reproduction, each parent contributes one of the two strands in the DNA of the offspring. Third, inside the cell, the DNA governs the production of proteins and other molecules essential to cell function.
51³Ō¹Ļ History and Origins
Origin of DNA1
Example Sentences
Officials have also been trying to establish how many people were killed on the ground and have been continuing the slow process of matching DNA samples to confirm the victims' identities.
"You know where the murder took place, you can collect DNA and fingerprints, you can find the murder weapon. You have almost immediate access to the body. You can conduct forensic tests."
"When people are still missing, how can they possibly complete the DNA process by tomorrow? What if my niece's remains have not even been found? The wait is killing us," he said.
More than 11 million customers have given DNA samples to 23andMe, putting a trove of genetic information under the companyās control.
But exactly how many and who was killed may take days to establish: investigators need to rely on DNA to formally identify the bodies found in the wreckage.
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When To Use
DNA is a large, complex molecule that allows cells to function and carries the genetic code that determines the traits of a living organism.DNA is in every cell of every living thing. Some viruses also have DNA.Life as we know it wouldnāt exist without DNAāit contains the instructions that cells need to function. DNA is found in the cell nucleus, and every cell in an organism has the exact same copy of DNA that is in every other cell. Each cell uses its copy of DNA whenever it needs to make a protein. Proteins have many essential jobs within a living thing. For example, your immune system produces proteins called antibodies to fight germs.The information thatās in DNA controls the development of specific traits, such as the shape of a leaf or the color of hair. Specifically, such traits are determined by genes, which are segments of DNA within strands called chromosomes. The set of all information contained in the DNA of any living thingāall of its inheritable traitsāis called its genome.DNA is an abbreviation of deoxyribonucleic acid. It is a type of macromolecule (a very large moleculeāone composed of hundreds of thousands of atoms) known as a nucleic acid. Nucleic acids are made of smaller molecules known as nucleotides, which are made of a phosphate, a sugar, and nitrogen bases. The four nitrogen bases in DNA are adenine (A), thymine (T), guanine (G), and cytosine (C).DNA has a shape known as a double helix, which resembles a spiraled ladder. The DNA ladder is built from two very long strands of nucleotides with the nitrogen bases pairing together to form the rungs of the ladder. The bases form base pairs, with adenine always paired to thymine and guanine always paired to cytosine. The phosphate and sugar within the nucleotide act as the sides of the ladder.Because DNA only exists within the cellās nucleus, the genetic information must be distributed somehow. This is one of the roles of RNA, which is a macromolecule that works alongside DNA to make proteins. During this process, RNA acts as a kind of copy of the DNA that carries its genetic information outside of the cell nucleus.We took a microscopic look at the differences between DNA, RNA, and mRNA, and their vital roles. Read all about it here!
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