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Ch 14- 17 Unit Test - Akron Central Schools
Ch 14- 17 Unit Test - Akron Central Schools

... domain • B) looped domain, 30-nm chromatin fiber, nucleosome • C) nucleosome, looped domain, 30-nm chromatin fiber • D) 30-nm chromatin fiber, nucleosome, looped domain ...
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... DNA is a chemical that encodes hereditary information. Genes are specific pieces or subunits of DNA that have function in the body. Genes come in pairs, one from our mother and the other from our father. A DNA test can directly detect an abnormality, called a mutation. Mutations are most often found ...
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... 48. We stated in the beginning of the year that negative feedback has an on/off switch and positive feedback can only amplify a response – how are these concepts related to negative and positive gene regulation? ...
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... In order to determine the MIP-2 genotype for the pups, I worked with transgenics. Transgenic mice are mice that have had foreign genes incorporated into their DNA. The result of the foreign DNA is an overactive gene. In this study, the mice were transgenic for MIP-2. My litter had a mom with no fore ...
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Biological Science, 4e (Freeman)

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... If you think about it … The word “sister” in this context is, probably, the single worst one that geneticists could have chosen. We think of sisters as siblings – nonidentical but related. It would be overwhelmingly more appropriate to call the two chromosomes in each homologous pair “sisters.” But ...
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Nucleic acid double helix



In molecular biology, the term double helix refers to the structure formed by double-stranded molecules of nucleic acids such as DNA. The double helical structure of a nucleic acid complex arises as a consequence of its secondary structure, and is a fundamental component in determining its tertiary structure. The term entered popular culture with the publication in 1968 of The Double Helix: A Personal Account of the Discovery of the Structure of DNA, by James Watson.The DNA double helix polymer of nucleic acids, held together by nucleotides which base pair together. In B-DNA, the most common double helical structure, the double helix is right-handed with about 10–10.5 base pairs per turn. This translates into about 20-21 nucleotides per turn. The double helix structure of DNA contains a major groove and minor groove. In B-DNA the major groove is wider than the minor groove. Given the difference in widths of the major groove and minor groove, many proteins which bind to B-DNA do so through the wider major groove.
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