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Transcript
Student Name: __________________________________ Period: _________ Protein Synthesis: Forwards and Backwards 1. Complete Data Table 1 using your knowledge of DNA transcription and the mRNA Genetic Code Wheel or Chart. Data Table 1 DNA mRNA Amino Acid TCA CCC AGU Serine Glycine Methionine GGA CCU GAG TAA CGC CGT ATT AAA TTA CCA TTT Glutamic Acid Isoleucine Tryptophan GCG GCA UUU Asparagine Glycine 2. Use the mRNA Genetic Code Wheel or Chart to list in Data Table 2 ALL possible mRNA sequences for the amino acids shown in this segment of hemoglobin. Data Table 2 Valine Histidine Leucine Threonine Proline Glutamic Acid Adapted from “Protein Synthesis Like a Banana Split” Charles A. Dana Center at The University of Texas at Austin 1 Student Name: __________________________________ Period: _________ 3. Examine the mRNA sequences for each amino acid recorded in Data Table 2. What pattern do you see?_______________________________________________________________________ 4. If we had an original strand of DNA: TAC GGA translate the following “mutated” DNA strands. a. TAC GGT CAT AAA TAG CAT AAA TAG ACT, transcribe and ACT Transcribe ________________________________________ Translate ________________________________________ b. TAC GGA CAG AAG TAG ACT Transcribe _________________________________________ Translate _________________________________________ c. TAC GGA CTA CAA GAG ACT Transcribe _________________________________________ Translate _________________________________________ 5. Which strands above would not have a change in the amino acids?___________________________ 6. Which strand above would have a change in the amino acids?_______________________________ Talk about it: 7. What advantage does this “redundancy” in the genetic code give to organisms?__________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Adapted from “Protein Synthesis Like a Banana Split” Charles A. Dana Center at The University of Texas at Austin 2
