| Each tRNA possesses a triplet of 3 exposed nitrogen bases that determine the code for a specific amino acid. The tRNA, each carrying ONE amino acid (the building blocks of proteins) move to the messenger RNA which is present on a ribosome.
The adjacent amino acids, one at a time, unite by a chemical process, form polypeptides. The process of decoding the mRNA by means of the tRNA to form polypeptides is called TRANSLATION! 6) If the mRNA read 5� AUU 3�, which tRNA will match up with that codon? What is the anticodon? What amino acid will the tRNA carry? 7) Using Fig. 8.3 pg. 244, what amino acid is added to the peptide chain if the mRNA read: AUU = _____________ GAG = _____________ UUC = _____________ AUG = _____________ UAA = _____________ 8) What do you think the �START� and �STOP� codons represent? 9) What amino acids are added to the peptide chain if the original DNA template read: 5� AGC TAT GGA 3� (careful!!) Amino Acid #1 = _____________________ Amino Acid #2 = _____________________ Amino Acid #3 = _____________________ 10) Look at Fig. 8.3 pg. 244 again. How many possible codons are there? How many different amino acids are there (don�t include the STOP command)? The number of codons do not match up with the varying number of amino acids. Explain how this can be possible. |