Multiple Choice
Which of these statements correctly describes RNA processing in eukaryotic cells?
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15. Gene Expression
Eukaryotic RNA Processing and Splicing
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Which of the following statements about RNA processing in eukaryotes is correct?
A
RNA processing involves the addition of a poly-A tail at the 5' end of the RNA molecule.
B
Introns are removed and exons are joined together during RNA splicing.
C
RNA processing occurs in the cytoplasm of eukaryotic cells.
D
RNA splicing is a process that occurs only in prokaryotic cells.
Verified step by step guidance1
Understand that RNA processing is a crucial step in the maturation of RNA transcripts in eukaryotic cells, which includes several modifications before the RNA can be translated into proteins.
Recognize that one of the key processes in RNA processing is RNA splicing, where non-coding regions called introns are removed, and coding regions called exons are joined together to form a continuous coding sequence.
Note that RNA processing, including splicing, occurs in the nucleus of eukaryotic cells, not in the cytoplasm. This is an important distinction from prokaryotic cells, which do not have a nucleus.
Identify that the addition of a poly-A tail is a modification that occurs at the 3' end of the RNA molecule, not the 5' end. The 5' end receives a different modification known as the 5' cap.
Clarify that RNA splicing is a process specific to eukaryotic cells, as prokaryotic cells typically do not have introns and thus do not undergo splicing.
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