When a ribosome, translating an mRNA, reaches a stop codon release factor protei
ID: 66485 • Letter: W
Question
When a ribosome, translating an mRNA, reaches a stop codon release factor protein binds, leading the disassembly of the ribosome/mRNA complex, and the release of the newly synthesized polypeptide. Release factor does not cause the premature termination of trans-synthesized polupeptide. Release factor does not cause the premature termination of translation because... The trouble with storing information directly in protein sequence is... A mutation occurs in the region of a polypeptide that, in the normal ease, is buried within e molecule s interior. The mutation replaces a hydrophobic amino acid with a positively charged amino acid. You would be justified in predicting that such a mutation would... A. alter the polypeptide"s location within the cell B. have little effect on the polypeptide's three dimensional structure C. function normally since it only effects the polypeptide's primary structure D. produce a dramatic change in protein folding and activity is wrong because: Many DNA binding transcription factors recognize specific DNA sequences. Which contacts are likely most important for the sequence specificity of transcription factors?Explanation / Answer
Based on the given data,
1)
When the ribosome encounter a non-sense codon (stop codons) certain proteins known as release factors along with the fact that there are no complementary tRNAs for the stop codons signal the end of the polypeptide elongation.
The release factor does not cause the premature termination of translation because the release factor binding site is occupied by a tRNA. Thus, the correct option is (A).
2)
The trouble with storing information directly in a protein sequence is not obvious how to copy a protein. Thus, the correct option is (C)
3)
Alter the polypeptide location within the cell. Thus, the correct option is (A).
4)
The transcription factors bind with phosphates of DNA. Thus, the correct option is (A).
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