Matching Amino Acids to tRNAs
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Questions and Answers

What are the criteria used by aa-tRNA synthetase enzymes to select a correct tRNA for an amino acid?

  • Acceptor arm, G:C bp at 3:70, Anticodon arm
  • Acceptor arm, C:G bp at 2:71, Anticodon arm
  • Acceptor arm, C:G bp at 3:70, Anticodon arm (correct)
  • Acceptor arm, C:G bp at 3:70, D-arm

What is the role of aa-tRNA synthetase enzymes in the selection of a correct amino acid? Which of the following is correct?

  1. They select an amino acid based on its size
  2. They select an amino acid based on its hydrophilicity
  3. They select an amino acid based on thermodynamic constraints / binding energy
  4. They select an amino acid based on its hydrophobicity

  • 2 and 3 only
  • 1,2, and 3 (correct)
  • 1,3, and 4
  • 4 only.

Which parts of the tRNA molecule is used by aa-tRNA synthetase enzymes to select a correct tRNA for an amino acid?

  • Acceptor arm (correct)
  • Anticodon arm
  • D-arm
  • Variable loop

What is the significance of C:G bp at 3:70 in the selection of a correct tRNA for an amino acid?

<p>It determines the thermodynamic constraints / binding energy (C)</p> Signup and view all the answers

What is the role of thermodynamic constraints in the selection of a correct amino acid?

<p>They determine the binding energy between the amino acid and the tRNA (B)</p> Signup and view all the answers

Which part of the tRNA molecule is used by the ribosome to recognize the correct codon during translation?

<p>Anticodon arm (D)</p> Signup and view all the answers

What are the criteria used by aa-tRNA synthetase enzymes to select a correct tRNA for an amino acid?

<p>Acceptor arm, C:G bp at 3:70, Anticodon arm (D)</p> Signup and view all the answers

What is the role of aa-tRNA synthetase enzymes in the selection of a correct amino acid?

<p>They select an amino acid based on thermodynamic constraints / binding energy (A)</p> Signup and view all the answers

Which part of the tRNA molecule is used by aa-tRNA synthetase enzymes to select a correct tRNA for an amino acid?

<p>Acceptor arm (D)</p> Signup and view all the answers

What is the significance of C:G bp at 3:70 in the selection of a correct tRNA for an amino acid?

<p>It determines the thermodynamic constraints / binding energy (C)</p> Signup and view all the answers

What is the role of thermodynamic constraints in the selection of a correct amino acid?

<p>They determine the binding energy between the amino acid and the tRNA (A)</p> Signup and view all the answers

Which part of the tRNA molecule is used by the ribosome to recognize the correct codon during translation?

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

What is the role of the hydrophilicity of an amino acid in the selection process?

<p>It determines the hydrophobicity of the amino acid (C)</p> Signup and view all the answers

How do aa-tRNA synthetase enzymes select a correct tRNA for an amino acid?

<p>By the C:G bp at 3:70 (D)</p> Signup and view all the answers

What is the role of aa-tRNA synthetase enzymes in protein synthesis?

<p>To select a correct amino acid for a tRNA (B)</p> Signup and view all the answers

Which criterion is NOT used by aa-tRNA synthetase enzymes to select a correct tRNA for an amino acid?

<p>D arm (A)</p> Signup and view all the answers

What is the basis for the selection of a correct amino acid by the charging enzyme?

<p>Thermodynamic constraints / binding energy (D)</p> Signup and view all the answers

Which of the following is NOT a criterion used by aa-tRNA synthetase enzymes for the selection of a correct amino acid?

<p>Hydrophobicity of the amino acid (A)</p> Signup and view all the answers

Which arm of tRNA is NOT used by aa-tRNA synthetase enzymes to select a correct tRNA for an amino acid?

<p>D arm (A)</p> Signup and view all the answers

Which of the following is NOT a criterion used by aa-tRNA synthetase enzymes for the selection of a correct amino acid?

<p>Hydrophobicity of the nucleotide (D)</p> Signup and view all the answers

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