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Questions and Answers

In eukaryotic mRNA, where is the start codon located?

  • Immediately before the 3' poly-A tail
  • Anywhere in the mRNA sequence
  • Immediately after the 5' cap
  • At the beginning of the mRNA sequence (correct)

What is the function of the initiator tRNA in eukaryotic mRNA translation?

  • To recognize the Kozak sequence
  • To carry the stop codon
  • To carry the amino acid methionine (correct)
  • To carry the start codon

What is the role of the ribosome in eukaryotic mRNA translation?

  • To read the stop codon
  • To recognize the Kozak sequence
  • To carry the initiator tRNA
  • To scan for the start codon (correct)

How is the initiation complex formed in prokaryotic translation?

<p>The 30s complex is formed before the 50s subunit binds (B)</p> Signup and view all the answers

What is the function of the initiator AUG codon in prokaryotic translation?

<p>To mark the beginning of the mRNA sequence (A)</p> Signup and view all the answers

Where is the initiator tRNA located in the initiation complex in prokaryotic translation?

<p>At the P-site (B)</p> Signup and view all the answers

What is the function of the 70s complex in prokaryotic translation?

<p>To carry the initiator tRNA (C)</p> Signup and view all the answers

What happens after the 30s complex is formed in prokaryotic translation?

<p>The 50s subunit binds to the mRNA (B)</p> Signup and view all the answers

What is the Kozak sequence in eukaryotic mRNA translation?

<p>The sequence surrounding the start codon (D)</p> Signup and view all the answers

What happens to stop codons in eukaryotic mRNA translation?

<p>They cause premature termination of translation (B)</p> Signup and view all the answers

In eukaryotic mRNA, where is the start codon located?

<p>At the beginning of the mRNA sequence (D)</p> Signup and view all the answers

What is the function of the initiator tRNA in eukaryotic mRNA translation?

<p>To carry the amino acid methionine (C)</p> Signup and view all the answers

What is the role of the ribosome in eukaryotic mRNA translation?

<p>To scan for the start codon (B)</p> Signup and view all the answers

How is the initiation complex formed in prokaryotic translation?

<p>The 30s complex is formed before the 50s subunit binds (B)</p> Signup and view all the answers

What is the function of the initiator AUG codon in prokaryotic translation?

<p>To carry the amino acid methionine (A)</p> Signup and view all the answers

Where is the initiator tRNA located in the initiation complex in prokaryotic translation?

<p>At the P-site (B)</p> Signup and view all the answers

What is the function of the 70s complex in prokaryotic translation?

<p>To assemble the ribosome (A)</p> Signup and view all the answers

What happens after the 30s complex is formed in prokaryotic translation?

<p>The 50s subunit binds to the mRNA (B)</p> Signup and view all the answers

What is the Kozak sequence in eukaryotic mRNA translation?

<p>The sequence surrounding the start codon (D)</p> Signup and view all the answers

What happens to stop codons in eukaryotic mRNA translation?

<p>They cause premature termination of translation (A)</p> Signup and view all the answers

In eukaryotic mRNA, where is the start codon usually located?

<p>Not necessarily at the beginning of the mRNA (C)</p> Signup and view all the answers

What is the function of the initiator tRNA in eukaryotic mRNA translation?

<p>To initiate translation at the start codon (A)</p> Signup and view all the answers

In prokaryotic initiation, where is the initiator tRNA placed in the ribosome complex?

<p>At the P-site (C)</p> Signup and view all the answers

What is the function of the Kozak sequence in eukaryotic mRNA translation?

<p>To mark the location of the start codon (A)</p> Signup and view all the answers

What is the size of the prokaryotic initiation complex?

<p>70s (B)</p> Signup and view all the answers

Which part of the prokaryotic initiation complex is responsible for binding to the mRNA?

<p>The 30s subunit (B)</p> Signup and view all the answers

What is the role of the 50s subunit in prokaryotic initiation?

<p>To catalyze peptide bond formation (B)</p> Signup and view all the answers

How does the ribosome locate the start codon in eukaryotic mRNA?

<p>By scanning from the 5' end of the mRNA (B)</p> Signup and view all the answers

What happens to the initiator tRNA after it binds to the start codon in eukaryotic initiation?

<p>It moves to the P-site (A)</p> Signup and view all the answers

What happens to the ribosomal subunits after translation is complete?

<p>They dissociate from each other (D)</p> Signup and view all the answers

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