Unusual Nucleosides That are Found in Mature TRNA Molecules Are

Question

Unusual nucleosides that are found in mature tRNA molecules are added during:
A) Transcription initiation
B) Transcription elongation
C) Transcription termination
D) Post transcriptional modification
E) It is not currently known when the unusual nucleosides are added

Accepted Answer

Unusual nucleosides, such as queuosine and m1G, are added during post-transcriptional modification of tRNA molecules. These modifications are important for maintaining tRNA structure and function during protein synthesis.