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Notes april 16 and 17 - Salmon River High School
Notes april 16 and 17 - Salmon River High School

... plant cells in culture will sometimes ________________ take up DNA on their ...
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C. Nucleic acid hybridization assays using cloned target DNA, and

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1 Unit 9: Modern Genetics Advance Organizer Topic: DNA, RNA

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< 1 ... 229 230 231 232 233 234 235 236 237 ... 294 >

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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