) Splicing of mRNA occurs in spliceosomes and chemically is a series of ________
ID: 320891 • Letter: #
Question
) Splicing of mRNA occurs in spliceosomes and chemically is a series of ________ reactions.
All processing of eukaryotic mRNAs takes place in the nucleus after transcription has been completed.(True/False)
Which of the following types of post-transcriptional processing does NOT occur for bacterial tRNAs?
A) Exonuclease cleavage
Degradation of bacterial mRNAs occurs:
A) from the 3' end.
B) largely by the activity of non-specific nucleases.
C) from the 5' end.
D) relatively slowly.
E) from both 3' and 5' ends at the same time.
B) Endonuclease cleavage
C) Non-template directed addition of bases
D) Methylation of bases
E) Addition of a phosphate group to the 5' end
Explanation / Answer
- Splicing of mRNA occurs in spliceosomes and chemically is a series of TRANSESTERIFICATION reactions.
- All processing of eukaryotic mRNAs takes place in the nucleus after transcription has been completed. ~ TRUE
Processing begins at the 5´ end, while the 3´ end is still being synthesized. Processing occurs in the nucleus and only mature RNA is transported out to the cytoplasm. Multiple RNA polymerases may transcribe the same template simultaneously.
- third question is not clear
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.