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Download Cells Use DNA and RNA to Make Proteins
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Transcript
DNA provides the code for each protein Proteins and Amino Acids 1. 20 different aa’s 2. some small proteins and some very large 3. cells put together sequences of aa’s 4. DNA provides the info to sequence aa’s 1. DNA and the Genetic Code 1. nucleotides: A, T, C, G 2. Adenine, Thymine, Cytosine, Guanine 3. A pairs with T; C pairs with G 4. every three bases codes for one amino acid – called a DNA triplet 5. ex: GAC codes for aspartic acid 6. ex: CAG codes for glutamine during interphase in nucleus DNA “unzips” free nucleotides in cytoplasm find their “home” 4. result: 2 new copies of original DNA 5. 1 for each daughter cell 6. DNA strand acts as template for complementary base pairs – A&T G&C 1. 2. 3.
