Stop UGU UGC UGA UGG CGU CGC CGA CGG AGU AGC AGA …

1 Third BaseUCAGUCAGUCAGUCAGS econd BaseGGCysteine (Cys)StopTryptophan (Trp)Arginine (Arg)Serine (Ser)Arginine (Arg)Glycine (Gly)UGUUGCUGAUGGCGUCGCCGACGGAGUAGCAGAAG GGGUGGCGGAGGGAAT yrosine (Tyr)StopHistidine (His)Glutamine(Glu)Asparagine(Asn)Lysine (Lys)Aspartic acid (Asp)Glutamic acid (Glu)UAUUACUAAUAGCAUCACCAACAGAAUAACA AAAAGGAUGACGAAGAGCCS erine (Ser)Proline (Pro)Threonine(Thr)Alanine (Ala)UCUUCCUCAUCGCCUCCCCCACCGACUACCACAAC GGCUGCCGCAGCGUUP henylalanine(Phe)Leucine (Leu)Leucine (Leu)Isoleucine (Ile)Start Methionine(Met)Valine (Val)UUUUUCUUAUUGCUUCUCCUACUGAUUAUCAUAAU GGUUGUCGUAGUGF irst , / Curriculum Framework / How Do Mutations Affect Living Organisms?

2 , How Does Protein Synthesis Occur?Indiana Biology Standards Resource, November 2003mRNA Codon/Amino acid , / Curriculum Framework / How Do Mutations Affect Living Organisms?, How Does Protein Synthesis Occur?Indiana Biology Standards Resource, November 2003 Teacher DirectionsExplain to students that they are to: Transcribe the DNA into mRNA codons by writing the complementary bases. Find a codon s first base in the first column of the chart;stay in this row. Find the second base in the middle of the chart, stay in this box.

3 Locate the third base in the far right column, this is the amino acid that matches the mRNA codon. Warn students against using the tRNA anticodon when using the chart. Remind students of the different purposes of the mRNA and tRNA. It is the messenger RNAcodon that carries the message specifying a certain amino acid ;it is the transfer RNA that transfers that amino acid to the growing protein chain. The tRNA anticodon is a sequence of three nucleotides that are the complement of the three nucleotides in the mRNA codon.

4 The function of the anticodon is to help the tRNA find the appropriate amino acid that the mRNA codon KeymRNA Codon/Amino acid ChartNot applicable.