Violinist's Thumb Chapter 3 Them's the DNA Breaks

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radioactivity

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the emission of ionizing particles or energy; can lead to increased rates of DNA mutation

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free radical

Back

highly reactive atom or molecule; has unbonded, lone electrons

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cleave

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cut, slice

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chromosome

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molecule of DNA; some chromosomes have protein in addition to DNA

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protein

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biomolecule composed of groups of amino acids bonded together by peptide bonds; hemoglobin and collagen are examples

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Hershey and Chase

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pair of scientists who determined that DNA is the molecule of heredity (as opposed to protein)

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sulfur

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element #16; found in protein but not DNA

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phosphorus

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element #15; found in DNA but not protein

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Watson and Crick

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pair of scientists who deduced the double-helix structure of DNA

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helix

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spiral