#Question id: 4270
#Unit 3. Fundamental Processes
RNA helicase contains characteristic
#Question id: 4271
#Unit 3. Fundamental Processes
To participate successfully in the peptidyl transferase reaction, the tRNA must rotate into the peptidyl transferase center of the large subunit in a process called as
#Question id: 4272
#Unit 3. Fundamental Processes
There are two classes of release factors for translation termination. Choose correct statements
A. Class I release factors recognize the stop codons and trigger hydrolysis of the peptide chain from the tRNA in the P-site.
B. Prokaryotes have two class I release factors called RF1 and RF2. RF1 recognizes the stop codon UGA, UAA and RF2 recognizes the stop codon UAG and UAA.
C. In eukaryotic cells, there is a single class I release factor called eRF1 that recognizes all three stop codons.
D. Class II release factors stimulate the dissociation of the ribosome after release of the polypeptide chain.
#Question id: 4273
#Unit 3. Fundamental Processes
80S initiation complex includes
#Question id: 4274
#Unit 3. Fundamental Processes
One mechanism that contributes to the fidelity of codon recognition involves the 16S rRNA other than initiation. Which of the following statements are correct in this phenomenon?
A. Codon recognition involves two adjacent uracil residues in the 16S rRNA component
B. The adjacent residues in the 16S rRNA do not discriminate between G:C or A:U base pairs and recognize either as correct
C. Even a single mismatch in the codon–anticodon base pairing alters the position of EF-Tu, reducing its ability to interact with the factor-binding center 16s rRNA, leads to a dramatic reduction in EF-Tu GTPase activity
D. Pyrophasphatic editing is key mechanism to ensure fidelity
#Question id: 4275
#Unit 3. Fundamental Processes
CCA-adding enzymes add a specific sequence without a template because