Multiple Choice
In eukaryotic RNA processing, what molecules in the spliceosome catalyze the intron removal reactions?
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15. Gene Expression
Eukaryotic RNA Processing and Splicing
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What is the first step in eukaryotic mRNA processing?
A
Export from the nucleus
B
Addition of a 5' cap
C
Polyadenylation at the 3' end
D
Splicing of introns
Verified step by step guidance1
Understand that eukaryotic mRNA processing involves several modifications to the pre-mRNA before it becomes mature mRNA.
Recognize that the first step in this process is the addition of a 5' cap. This cap is a modified guanine nucleotide added to the 5' end of the pre-mRNA.
The 5' cap plays a crucial role in protecting the mRNA from degradation and is involved in the initiation of translation.
After the 5' capping, other processing steps such as splicing of introns and polyadenylation at the 3' end occur.
Remember that these modifications are essential for the stability, export, and translation of the mRNA in eukaryotic cells.
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