Multiple Choice
Which are the coding sequences that remain in the final mRNA after eukaryotic RNA processing and splicing?
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15. Gene Expression
Eukaryotic RNA Processing and Splicing
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What is removed during mRNA processing in eukaryotic cells?
A
Poly-A tail
B
Introns
C
5' cap
D
Exons
Verified step by step guidance1
Understand the concept of mRNA processing in eukaryotic cells, which involves several modifications to the pre-mRNA molecule before it becomes mature mRNA.
Learn that during mRNA processing, introns, which are non-coding sequences, are removed from the pre-mRNA. This process is known as splicing.
Recognize that exons, which are coding sequences, are retained and joined together to form the mature mRNA.
Identify that the 5' cap and Poly-A tail are added to the mRNA during processing, not removed. The 5' cap is added to the beginning of the mRNA, and the Poly-A tail is added to the end.
Conclude that the removal of introns is a crucial step in mRNA processing, ensuring that only the coding sequences (exons) are present in the mature mRNA, ready for translation into proteins.
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