Translation

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Author:
shelbymailho
ID:
112297
Filename:
Translation
Updated:
2011-10-26 03:18:15
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Cell Bio Chapter
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Practice Questions
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  1. Each nucleotide in an mRNA encodes 1 amino acid in a protein (T or F?).
    False.
  2. How many nucleotides are necessary to specific 1 single amino acid?
    3
  3. In principple, how many reading frames in RNA can potentially be translated into proteins?
    3
  4. What is NOT true about codons in mRNA molecules?
    Some codons code for more than 1 amino acid.
  5. Amino acids are attached by their tRNA molecules by...?
    Aminoacyl-tRNA synthease
  6. An RNA message is decoded by ____.
    Ribosomes
  7. At which end of an mRNA molecule do ribosomal subunits first bind?
    5' end
  8. Translation of an mRNA begins at the following start codon...
    AUG
  9. In eukaryotes, the initiator tRNA always carries which amino acid?
    Methionine
  10. Which part of a protein is synthesized by a ribosome first?
    N -terminus
  11. At which site does the charged initiator tRNA first bind on the ribosome?
    P - site
  12. At what site do ALL charged tRNAs (with the exception of the initiator tRNA) first bind on the ribosome?
    A -site
  13. Stop codons are recognized by a tRNA (T or F?).
    False
  14. What is a polyribosome?
    a cluster of ribosomes translating the same mRNA, but positioned at different sites along the mRNA.
  15. How do proteases act?
    By hydrolyzing peptide bonds between amino acids in a protein.
  16. Proteasomes act primarily on proteins tha thave been marked for destruction by the covalent attachment of which small protein?
    Ubiquitin

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