Processing of the mRNA begins before transcription of eukaryotic mRNA\'s is complete. The end of the mRNA is prepared for recognition by the ribosomes of the cell and protected from exonuclease degradation by a process called \"capping\". During this multi-step process a nucleoside is added to the end of the mRNA and then modified.
Complete the following statements about the capping process.
Capping occurs at:
5' the end of the mRNA.
3' the end of the mRNA.
The nucleoside added is: .
The nucleoside is connected to the mRNA through a:.
The added nucleoside is modified by methylation at: .
The mRNA is modified by methylation of:.
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