How much do you know about initiator tRNA and protein synthesis?
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Questions and Answers

What is the function of initiator tRNA?

  • To activate amino acids
  • To deliver internal methionine residues
  • To transport the first amino acid of all proteins (correct)
  • To connect amino acids in a specific sequence

Why is peptide bond formation not feasible under normal physiological conditions?

  • Because it requires reading of the genetic codon
  • Because it requires elongator tRNA
  • Because it requires activation of amino acids (correct)
  • Because it requires initiator tRNA

What is the difference between initiator tRNA and elongator tRNA?

  • They read different genetic codons
  • They transport different amino acids
  • They have different structures (correct)
  • They activate amino acids differently

What is the role of elongator tRNA?

<p>To deliver internal methionine residues (B)</p> Signup and view all the answers

What is the significance of the first amino acid of all proteins being methionine?

<p>It is transported by a unique tRNA (A)</p> Signup and view all the answers

Why can't amino acids be connected in a specific sequence without tRNA?

<p>It would not allow for a variety of proteins (C)</p> Signup and view all the answers

What is the function of tRNA?

<p>To transport amino acids (A)</p> Signup and view all the answers

Which type of tRNA is responsible for delivering internal methionine residues?

<p>Elongator tRNA (B)</p> Signup and view all the answers

What is the unique characteristic of initiator tRNA?

<p>It transports the first amino acid of all proteins (B)</p> Signup and view all the answers

Why is activation of amino acids necessary for peptide bond formation?

<p>Because under normal physiological conditions peptide bond formation is not thermodynamically feasible (C)</p> Signup and view all the answers

What is the function of initiator tRNA?

<p>To transport the first amino acid of all proteins (D)</p> Signup and view all the answers

Why is peptide bond formation not feasible under normal physiological conditions?

<p>Because it requires activation of amino acids (D)</p> Signup and view all the answers

What is the difference between initiator tRNA and elongator tRNA?

<p>They have different structures (D)</p> Signup and view all the answers

What is the role of elongator tRNA?

<p>To deliver internal methionine residues (A)</p> Signup and view all the answers

What is the significance of the first amino acid of all proteins being methionine?

<p>It is transported by a unique tRNA (B)</p> Signup and view all the answers

Why can't amino acids be connected in a specific sequence without tRNA?

<p>It would not allow for a variety of proteins (C)</p> Signup and view all the answers

What is the function of tRNA?

<p>To transport amino acids (D)</p> Signup and view all the answers

Which type of tRNA is responsible for delivering internal methionine residues?

<p>Elongator tRNA (A)</p> Signup and view all the answers

What is the unique characteristic of initiator tRNA?

<p>It transports the first amino acid of all proteins (D)</p> Signup and view all the answers

Why is activation of amino acids necessary for peptide bond formation?

<p>Because under normal physiological conditions peptide bond formation is not thermodynamically feasible (B)</p> Signup and view all the answers

Why is tRNA needed to transport an amino acid?

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

What is the first amino acid of all proteins?

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

What is the difference between initiator tRNA and elongator tRNA?

<p>Initiator tRNA is used for the first amino acid of all proteins, while elongator tRNA is used for internal met residues (C)</p> Signup and view all the answers

What is the role of elongator tRNA?

<p>To deliver internal met residues (C)</p> Signup and view all the answers

Why can't amino acids be connected in a specific sequence without tRNA?

<p>Because peptide bond formation is not thermodynamically feasible (D)</p> Signup and view all the answers

What is the unique tRNA that transports methionine called?

<p>Initiator tRNA (A)</p> Signup and view all the answers

What is the first amino acid of all proteins?

<p>Methionine (C)</p> Signup and view all the answers

What is the role of tRNA in protein synthesis?

<p>All of the above (B)</p> Signup and view all the answers

What is the difference between initiator tRNA and elongator tRNA?

<p>Initiator tRNA is used for the first amino acid of all proteins, while elongator tRNA is used for internal met residues (C)</p> Signup and view all the answers

What is the function of the initiator tRNA?

<p>To transport the first amino acid of all proteins (D)</p> Signup and view all the answers

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