How much do you know about the elongation process in protein synthesis?

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Questions and Answers

During elongation, how many steps are involved in the addition of an amino acid?

  • Four (correct)
  • Five
  • Two
  • Three

What is the first step during elongation?

  • Peptide bond formation at 'A-site'
  • Translocation of peptidyl tRNA from 'A-site' to 'P-site'
  • Removal of the free tRNA via the 'E-site'
  • Transfer of aa-tRNA to A-site (correct)

What is the second step of proofreading during elongation?

  • Transfer of aa-tRNA to A-site
  • Translocation of peptidyl tRNA from 'A-site' to 'P-site'
  • Removal of the free tRNA via the 'E-site'
  • Peptide bond formation at 'A-site' (correct)

What is the function of EF-Tu during elongation?

<p>To transfer aa-tRNA to the 'A-site' (D)</p> Signup and view all the answers

What is the role of EF-Ts during elongation?

<p>To convert EF-Tu-GTP into EF-Tu-GDP (B)</p> Signup and view all the answers

What is required for EF-Tu to transfer aa-tRNA to the A-site during elongation?

<p>GTP-protein (C)</p> Signup and view all the answers

What happens if aa-tRNA is placed correctly at the A-site during elongation?

<p>GTP is hydrolyzed and forms inactive EF-Tu-GDP (A)</p> Signup and view all the answers

Which tRNA does not follow the four-step elongation process?

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

What is the third step during elongation?

<p>Translocation of peptidyl tRNA from 'A-site' to 'P-site' (C)</p> Signup and view all the answers

What is the fourth step during elongation?

<p>Removal of the free tRNA via the 'E-site' (D)</p> Signup and view all the answers

What happens if aa-tRNA is placed correctly at the A-site during elongation?

<p>EF-Tu-GTP is converted into EF-Tu-GDP (B)</p> Signup and view all the answers

What is the second factor involved in the conversion of EF-Tu-GDP into EF-Tu-GTP during elongation?

<p>EF-Ts (A)</p> Signup and view all the answers

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