| 词汇 | double-helix |
| 释义 | double helix noun[ U ] biology specializeduk /ˌdʌb.əl ˈhiː.lɪks/ us /ˌdʌb.əl ˈhiː.lɪks/ the structure of a DNAmolecule（DNA 分子的）双螺旋结构 Shutter2U/iStock/Getty Images Plus/GettyImages Genetics accession number adenine anaphase autosomal autosomally dizygotic genetically genetically engineered geneticist genic genomic genomics monozygotic mutate non-Darwinian non-familial non-genetic non-mutant nondominant sex-linked double helix | American Dictionarydouble helix noun[ U ] us/ˈdʌb·əl ˈhi·lɪks/ science the shape like two curving lines twisted together that is made by two strands (= strings) of DNA (= the chemical that controls each cell) Examples of double helixdouble helix Writhe relates to how many times the axis formed by the doublehelix crosses over itself, forming a supercoil. Writhe is a highly compacting manifestation of linking number deviations since it represents the winding of the doublehelix upon itself. The first prerequisite is the presence of a sequence that can fold back on itself to form a paired doublehelix. 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 a doublehelix whereas 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 a doublehelix is no different in kind from that exhibited in the linear sequence of bases. Interacting ions modulate this interaction : stabilization and destabilization of the doublehelix is more complex than simple charge neutralization. What is certain is that published research and other evidence at all levels should feed into this process, in order to maintain the doublehelix of innovation and generalizability. Many forms of the open state are possible for a single base pair, although a preference for opening towards the major groove of the doublehelix has been found. Nanotechnology and the doublehelix. Another doublehelix may 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 the doublehelix is called a base pair. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Its structure is a doublehelix, 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 the doublehelix. 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 a doublehelix that 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 the doublehelix, riders are pulled through a bunny hop. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of double helix 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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