Genetic code: 64 codons (triplets of mRNA). 61 codons for 20 amino acids (degenerate). 3 stop codons: UAA, UAG, UGA. Start codon: AUG (codes for Methionine). tRNA has anticodon complementary to codon. Ribosome has A, P, E sites. Peptide bond forms between amino acids. Polypeptide grows from N-terminus to C-terminus.
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