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Questions and Answers
What is the role of the Shine-Dalgarno sequence in translation initiation?
What is the role of the Shine-Dalgarno sequence in translation initiation?
- It binds to release factors during termination.
- It enhances the dissociation of the large and small ribosomal subunits.
- It forms a complex with GTP during elongation.
- It pairs with their complementary nucleotides in the 16S rRNA. (correct)
What is the function of initiation factor 3 (IF-3) during translation initiation?
What is the function of initiation factor 3 (IF-3) during translation initiation?
- Binds to the small subunit and prevents binding of the large subunit. (correct)
- Forms a complex with initiator tRNA.
- Facilitates translocation of the ribosome.
- Enhances the dissociation of the large and small ribosomal subunits.
In eukaryotic cells, what plays a critical role in the initiation of protein synthesis?
In eukaryotic cells, what plays a critical role in the initiation of protein synthesis?
- The cap at the 3' end of mRNA.
- The Shine-Dalgarno sequence on mRNA.
- The cap at the 5' end of mRNA. (correct)
- The presence of initiator tRNA.
During elongation, what is the role of elongation factor Tu (EF-Tu)?
During elongation, what is the role of elongation factor Tu (EF-Tu)?
What triggers termination of protein synthesis?
What triggers termination of protein synthesis?
Which factor prevents the large subunit of the ribosome from binding during translation initiation?
Which factor prevents the large subunit of the ribosome from binding during translation initiation?
What is the first step in the maturation of mRNA in eukaryotes?
What is the first step in the maturation of mRNA in eukaryotes?
What is the function of the Poly(A) tail in eukaryotic mRNA?
What is the function of the Poly(A) tail in eukaryotic mRNA?
Which enzyme is responsible for adding a guanosine triphosphate to the 5'-end of mRNA?
Which enzyme is responsible for adding a guanosine triphosphate to the 5'-end of mRNA?
What sequence is recognized by a specific endonuclease for cutting the growing RNA molecule in eukaryotic mRNA?
What sequence is recognized by a specific endonuclease for cutting the growing RNA molecule in eukaryotic mRNA?
What happens after recognition and cutting of the growing RNA molecule at AAUAAA sequence?
What happens after recognition and cutting of the growing RNA molecule at AAUAAA sequence?
What modification occurs to the guanine of the cap on eukaryotic mRNA?
What modification occurs to the guanine of the cap on eukaryotic mRNA?
What is the significance of having multiple isoaccepting tRNAs in cells?
What is the significance of having multiple isoaccepting tRNAs in cells?
Which hypothesis explains the ability of some non-standard base pairings at the third position of a codon?
Which hypothesis explains the ability of some non-standard base pairings at the third position of a codon?
What is the role of aminoacyl-tRNA synthetases in protein synthesis?
What is the role of aminoacyl-tRNA synthetases in protein synthesis?
Where does a ribosome attach during translation on an mRNA molecule?
Where does a ribosome attach during translation on an mRNA molecule?
What provides the energy required for the attachment of tRNA to its appropriate amino acid?
What provides the energy required for the attachment of tRNA to its appropriate amino acid?
Which part of a tRNA molecule is responsible for attaching to its corresponding amino acid?
Which part of a tRNA molecule is responsible for attaching to its corresponding amino acid?
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