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Answers11.february
Answers11.february

... at the ends of ribosomal RNA in centromers in the middle of chromosomes at the ends of chromosomes in nuclear DNA in mitochondrial DNA in prokaryotes in eukaryotes ...
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... Explain what a Punnett Square is. How is it used to predict probability? Be able to complete a Punnett Square. DNA Structure: Draw a nucleotide of DNA and identify the three parts. Identify the 4 nitrogen bases in DNA The strands of DNA molecules are held together by hydrogen bonds. Does a molecule ...
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14-3 Human Molecular Genetics

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... 1) After mixing a heat-killed, phosphorescent strain of bacteria with a living nonphosphorescent strain, you discover that some of the living cells are now phosphorescent. Which observations would provide the best evidence that the ability to fluoresce is a heritable trait? A) DNA passed from the he ...
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HGP - eduBuzz.org

... Uses physical properties of DNA (size and charge) to separate molecules Gel electrophoresis involves running an electric current through an agarose gel. DNA is loaded into wells at the negative end. DNA is repelled, and moves through the agarose gel at different speeds depending on the size of a fra ...
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powerpoint notes
powerpoint notes

... • Helicase  unwinds the double helix • DNA polymerase  builds the new DNA strand • DNA ligase “glues” DNA fragments together ...
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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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