ANTH 105 Lecture Notes - Lecture 4: Dna Replication, Natural Selection, Zygosity
7 Sep 2016
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Document Summary
Copy instructions for protein is taken from nucleus to cytoplasm where it is translated and protein produced. In nucleus w/ dna as coding for a giving protein (unzip) Open base pairs for protein attract complementary bases of: mrna- messenger rna (present in cell) Creates copy of dna strand for specific protein mrna pairs like dna but u (uracil) replaces t when pairing with a. Sequence has start and stop codon telling where protein info begins & After mrna strand for protein is produced, it detaches and dna zips up mrna leaves to cytoplasm and attaches to ribosome that reads mrna codons. Attracts trna (transfer rna) along w/ anticodon and specific amino acid required for protein. Ribosome reads mrna codons and trna anti-codons pair, amino acids join. Ribosomes move along mrna strand trna is released creating amino acid chain. Process begins with start and end with stop codon. Once stop codon is reached polypeptide chain is released to become functional protein.
