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DNA fingerprinting and the 16S
DNA fingerprinting and the 16S

... Second step: add large excess of primers relative to the amount of DNA being amplified, and cool the reaction mixture to allow double-strands to form again (because of the large excess of primers, the two strands will always bind to the primers, instead ofwith each other). Third step: to a mixture ...
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... 1. Using the table supplied (last page of the exam), determine which of the nucleotide sequences below has the potential to encode the following protein sequence: Val - Leu – Leu – Gln - Asp A. UGUCUCUUGCAAGACA B. AGUAUUGUUGCAGGAUU B. UAGUUCUUUUACAGGAC ...
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... 10. What are the consequences of lipids having small polar regions and large domains of carbons and hydrogen? 11. Fats are often referred to as triglycerides. Explain why in terms of the chemical structure of lipid components. 12. List three differences between saturated and unsaturated fats. 13. Wh ...
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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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