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one strain of bacteria changes |
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a virus that infects bacteria |
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DNA is a long molecule made up of units |
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tightly packed togthere DNA and protein |
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DNA that is tightly coiled around proteins |
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before a cell divides, it duplicates its DNA in a copying process |
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the principle enzymes involved in DNA rep. |
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coded DNA instructions that control the production of protein |
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RNA that carries copies of gene's |
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ribosomes made of several dozen proteins |
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transfer each ammino acid |
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similar to DNA polymerase |
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has a specific base sequences |
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DNA of eukaryotic genes contain sequences of nucleotides |
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DNA sequences that code for proteins |
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consists of three consecutive nucleotides |
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the decoding of a mRNA message into a polypeptide chain |
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complementary to one mRNA codon |
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gene mutations involving changes in one or few nucleotides |
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they shift the "reading frame" of the genetic messages |
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the condition in which an organism has extra sets of chromosomes |
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a group of genes that operate together |
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means they become specialized in structure and function |
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control the differentiation of cells and tissues in the embryo |
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