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Answer 1

This answer may help ! http://answers.yahoo.com/question/index?qid=20081109205019AAOJ5gh

Answer 2

#2 Translation:
4. Each set of 3 bases on the mRNA is called a codon. Each codon calls for a specific amino acid to be brought to the building site. The first codon is always AUG, so it is called the start codon.
5. In the cytoplasm are molecules of tRNA. On one end of a tRNA molecule is the anticodon: a set of three bases that will match a certain codon. The other end of the tRNA can pick up and hold a certain amino acid. Each tRNA can only hold one kind of amino acid.
6. A tRNA with an anticodon that matches whichever codon is in place on the ribosome (think of that codon as being "at bat") clicks into place. The codon and anticodon fit together like two pieces of a jigsaw puzzle. Since the first codon is AUG, the first anticodon must have the matching bases UAC. (Memory trick: AU match like in AUstralia; CG match and they both are round letters.)
7. The process moves along to the next codon, or the next "batter". Lets say that the next codon is UCC. Then a tRNA with the anticodon AGG will fit.
8. The amino acid brought by the first tRNA bonds to the amino acid brought by the second tRNA. The first tRNA is free to go, and the second tRNA stays in place for now.
9. Steps 7 and 8 repeat until finally they come to an mRNA codon that is the STOP codon. At this point the amino acid chain breaks off, folds up, and the protein is ready to use.

Answer 3

#3 http://answers.yahoo.com/question/index?qid=20080420172130AAj1k6W