| 单词 | double helix |
| 释义 | double helix noun[U] biologyspecializeduk/ˌdʌb.əl ˈhiː.lɪks/us/ˌdʌb.əl ˈhiː.lɪks/thestructureof aDNAmolecule （DNA 分子的）双螺旋结构 Shutter2U/iStock/Getty Images Plus/GettyImages Genetics
double helix| American Dictionarydouble helix noun[U] us/ˈdʌb·əl ˈhi·lɪks/science theshapelike twocurvinglinestwistedtogether that is made by twostrands(=strings)ofDNA(= thechemicalthatcontrolseachcell) Examplesofdouble helixdouble helix Writhe relates to how many times the axis formed by thedoublehelixcrosses over itself, forming a supercoil. From theCambridge English Corpus Writhe is a highly compacting manifestation of linking number deviations since it represents the winding of thedoublehelixupon itself. From theCambridge English Corpus The first prerequisite is the presence of a sequence that can fold back on itself to form a paireddoublehelix. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.First, the zinc fingers exert non-specific interaction with the backbone of adoublehelixwhereas the second mode allows zinc fingers to specifically recognize the individual bases that bulge out. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The information contained in adoublehelixis no different in kind from that exhibited in the linear sequence of bases. From theCambridge English Corpus Interacting ions modulate this interaction : stabilization and destabilization of thedoublehelixis more complex than simple charge neutralization. From theCambridge English Corpus What is certain is that published research and other evidence at all levels should feed into this process, in order to maintain thedoublehelixof innovation and generalizability. From theCambridge English Corpus Many forms of the open state are possible for a single base pair, although a preference for opening towards the major groove of thedoublehelixhas been found. From theCambridge English Corpus Nanotechnology and thedoublehelix. From theCambridge English Corpus Anotherdoublehelixmay be found tracing the spaces, or grooves, between the strands. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.This arrangement of two nucleotides binding together across thedoublehelixis called a base pair. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Its structure is adoublehelix, with two strands wound around each other. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.There is also a major groove and a minor groove on thedoublehelix. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The sculpture, which stands tall with a base, is adoublehelixthat appears to make a quarter turn between the bottom and the top. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Once the train leaves thedoublehelix, riders are pulled through a bunny hop. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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