Help with Protein Synthesis?

Protein Synthesis, AP biology. Help?!?

• Describe the composition and structure of the ribosome and explain how this structure allows for amino acids to be bonded together? Explain how the different parts of the molecule allow the pre-mRNA molecule to function. Describe the process of translation leading to the production of a protein.

• Answer:

  a ribosome is composed of a large subunit and a small subunit. the small subunit is where the mRNA gets attached. the large subunit of the ribosome has three active sites. the P site ( place where the first transfer RNA molecule carrying the first amino acid enters the ribosome), the A site is (where all the following amino acids that are attached to transfer RNA molecules enter the ribosome) and the E site is where the tranfer RNA that no longer has an amino acid attached to it exits the ribosome. so the first transfer RNA (with an attached amino acid) enters the P site, the second transfer RNA (with another amino acid attached to it) enters the A site. the amino acid in the P site gets attached to the amino acid in the A site. now this new transfer RNA molecule that has two amino acids attached to it moves into the P site while the transfer RNA who lost its amino acid moves into the E site and exits the Ribosome. Finally a new transfer RNA with another amino acid enters the A site and this process is repeated over and over again until a stop codon is reached with terminates translatio.