Chapter 9 DNA - Chapter 9 DNA: The Molecule of Heredity...

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Chapter 9 DNA: The Molecule of Heredity Vocabulary adenine – nitrogenous base found in both DNA and RNA bases – one of the nitrogen-containing, single or double ringed structures that distinguish one nucleotide from another. In DNA, the bases are adenine, guanine, cytosine, and thymine chromosome – a single DNA double helix together with proteins that help to organize DNA complementary base pairs – in nucleic acid, bases that pair by H bonding. cytosine – nitrogenous base found in both DNA and RNA DNA - DNA helicase – enzyme that helps unwind the DNA double helix during DNA replication DNA ligase – enzyme that joins the sugars and phosphates in DNA strand to create a continuous sugar-phosphate backbone DNA polymerase – enzyme that bonds DNA nucleotides together into a continuous strand, using a preexisting DNA strand as a template DNA replication – the copying of the double stranded DNA molecule, producing 2 identical DNA double helices double helix – shape of the two-stranded DNA molecule free nucleotides – nucleotide that have not been joined together to form DNA or RNA strand gene – unit of heredity that encodes the information needed to specify the amino acid sequence of proteins and hence particular traits; a function segment of DNA at a particular
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This note was uploaded on 04/09/2008 for the course BIOL 1005 taught by Professor Mvlipscomb during the Fall '07 term at Virginia Tech.

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Chapter 9 DNA - Chapter 9 DNA: The Molecule of Heredity...

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