Biology 2e
Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 15, Problem 18RQ

A scientist introduces a mutation that makes the 60S ribosomal subunit nonfunctional in a human cell line. What would be the predicted effect on translation?

  1. Translation stalls after the initiation AUG codon is identified
  2. The ribosome cannot catalyze the formation of peptide bonds between the tRNAs in the A and P sites
  3. The ribosome cannot interact with mRNAs
  4. tRNAs cannot exit the E site of the ribosome.

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How does the antibiotic streptomycin inhibit bacterial translation? Multiple Choice blocks elongation by preventing the large ribosomal subunit from binding to the small ribosomal subunit interferes with the normal pairing of aminoacyl TRNAS and codons resulting in abnormal proteins prevents the release of the initiator tRNA from the P site, blocking elongation blocks termination by competitively inhibiting the binding of a release factor to the A site
Which of the following is NOT an event associated with translation termination?   A stop codon enters the A site on the ribosome. A Release Factor enters the A site A terminal amino acid is added to the polypeptide to signal the end of translation. Release Factor mediates the hydrolysis of the polypeptide from the tRNA at the P site. The polypeptide and tRNA are released and the ribosomal subunits are separated.
Drag the functions involved in the bacterial translation process into the appropriate box with the corresponding name of the translation factor or component. Reset Help Prevents premature association of the large ribosomal subunit with the small Serves as the MRNA binding site for Guides the initiator fMet-tRNA into the the small ribosomal subunit. P site. ribosomal subunit. Prevents entry of an amino-acyl tRNA into the ribosome A site during the early initiation stages. Assists incoming amino-acyl RNA into the A site. IF1 IF2 IF3 EF-Tu Shine-Dalgarno sequence

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