summarize the process of forming a protein from a base sequence in DNA. use the following key points and terms: Transcription (location in the cell, promoter, RNA polymerase, mRNA, complementary base pairing with U substituted for T, termination sequence, modification of mRNA before leaving nucleus) and translation (location in cell, ribosomes, mRNA, codon, genetic code, tRNA, anticodon, amino acid, peptide bonds, stop codon, new polypeptide).