Biology 30 - Protein Synthesis
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1. Name the protein responsible for pulling the DNA apart. What protein assembles the RNA strand on the open DNA strand?
2. What is a 'promoter'?
• Watch the RNA strand continue on the right side of the screen.
3. Explain what modifications are made to the RNA strand after separating for the DNA strand.
4. How many bases long are mRNA molecules?
5. How many different kinds of amino acids are there?
6. How many different kinds of tRNA are there? How many nucleotides long is a typical tRNA molecule?
7. How many protein sub-units are in a ribosome?
8. Where do the RNA types go after transcription has taken place?
2. What is a 'promoter'?
• Watch the RNA strand continue on the right side of the screen.
3. Explain what modifications are made to the RNA strand after separating for the DNA strand.
4. How many bases long are mRNA molecules?
5. How many different kinds of amino acids are there?
6. How many different kinds of tRNA are there? How many nucleotides long is a typical tRNA molecule?
7. How many protein sub-units are in a ribosome?
8. Where do the RNA types go after transcription has taken place?
Step #2 – Translation:
1. What is needed (molecules) for translation to happen?
2. Where are amino acid molecules attached to the tRNA?
3. What amino acid is attached to the tRNA that begins all polypeptide chains?
4. What is the "p" site and the "a" site I the ribosome?
5. How many amino acids are attached to the polypeptide chain at one time?
• Watch the growing polypeptide chain o the left – watch how the amino acids are added to the growing chain.
6. What happens when the UAA codon is reached?
7. Are all polypeptide chains the same length?
8. Can we build another polypeptide chain using the same mRNA? Explain
2. Where are amino acid molecules attached to the tRNA?
3. What amino acid is attached to the tRNA that begins all polypeptide chains?
4. What is the "p" site and the "a" site I the ribosome?
5. How many amino acids are attached to the polypeptide chain at one time?
• Watch the growing polypeptide chain o the left – watch how the amino acids are added to the growing chain.
6. What happens when the UAA codon is reached?
7. Are all polypeptide chains the same length?
8. Can we build another polypeptide chain using the same mRNA? Explain
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