DNA

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

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

DNA (deoxyribonucleic acid)

See GENETICS.

Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000

DNA

(biochemistry)

deoxyribonucleic acid

DNA

(1) See Windows DNA and DNA storage.

(2) (Digital Network Architecture) Introduced in 1978, the DNA was Digital's umbrella term for its enterprise network architecture based on DECnet. See Digital Equipment.

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References in periodicals archive

In addition, the previously announced acquisition of a license from Children's Mercy Hospitals & Clinics for the production of their newly patented single copy DNA probes will enable Life Sciences to enter the growing cytogenetics market.

ENZO BIOCHEM REPORTS $3.4 MIL NET LOSS FOR 3RD QTR FISCAL'06

(5) Molecular biologists have been working on a nanoscale to manipulate genetic material from a variety of organisms (human, animal, insect, plant, bacteria, virus) for over 25 years, with the ability to isolate, cut, move, join, splice together, synthesize and copy DNA. (6) In terms of scale, to better understand nanotechnology, most mammalian cells are between 20,000-30,000 nanometres (nm) in size, with some exceptions like neurons (brain cells, spinal cord) that can reach lengths up to 1 metre.

Considerations for using genetic material in medical nanotechnology

The enzymes that copy DNA to RNA and vice versa can't tell the difference between the two components, but the subtle chemical tweak--akin to writing a letter in a hard-to-read, byzantine font--relays an entirely different meaning to the ribosome, the researchers suggest.

Loophole in traffic laws challenges current understanding of genetics: RNA wrinkle causes cell's machinery to run through stop signs

Meanwhile, PSNI Detective Inspector Sean Fitzpatrick said the police recovered seven spent cartridges from the living room and a low copy DNA was recovered from the cartridges.

SHOT DEAD BEFORE HE COULD GIVE EVIDENCE; Murdered Catholic father was witness in UDA feud gun attack

Forensic scientists are examining cigarette butts, Joseph's buggy and clothing recovered from the scene and hope to "grow low copy DNA".

ABI SUSPECT.. I DIDN'T DO IT; He denies stabbing Her speech improves