| 单词 | DNA |
| 释义 | DNA (once / 1864 pages) n Your DNA is what makes you uniquely you. It's that double helix that your genes are made of. Your DNA accounts for why you resemble your parents and it distinguishes you from your pet frog and from everybody else. DNA stands for deoxyribonucleic acid, sometimes called "the molecule of life," as almost all organisms have their genetic material codified as DNA. Since each person’s DNA is unique, "DNA typing" is a valuable tool in connecting suspects to crime scenes. You can also use the word less scientifically, as in “it’s just not in my DNA to sit through six hours of meetings.” WORD FAMILYDNA USAGE EXAMPLESInvestigators also exhumed Lawless’ body in October 2013 from a Benton cemetery, collecting DNA samples for possible future testing. Washington Times(Dec 31, 2016) The DNA test “helps us understand we’re not all from one special place, which is really peculiar to America,” Devor said. Washington Post(Dec 24, 2016) Court records say a DNA test determined blood at the first home matched Sloe. Washington Times(Dec 29, 2016) n (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 Syn|Hypo|Hyper deoxyribonucleic acid, desoxyribonucleic acid operon a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene cDNA, complementary DNAsingle-stranded DNA that is complementary to messenger RNA or DNA that has been synthesized from messenger RNA by reverse transcriptase episomeDNA that is not incorporated into the genome but is replicated together with the genome (especially in bacterial cells) coding DNA, exonsequence of a gene's DNA that transcribes into protein structures intron, noncoding DNAsequence of a eukaryotic gene's DNA that is not translated into a protein junk DNAstretches of DNA that do not code for genes recombinant DNA, recombinant deoxyribonucleic acidgenetically engineered DNA made by recombining fragments of DNA from different organisms sticky endan end of DNA in which one strand of the double helix extends a few units beyond the other jumping gene, transposona segment of DNA that can become integrated at many different sites along a chromosome (especially a segment of bacterial DNA that can be translocated as a whole) proviruscDNA copy of the RNA genome of a retrovirus; the genetic material of a virus as incorporated into and able to replicate with the genome of a host cell dscDNAdouble-stranded cDNA polymer a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers |
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