Multiple Choice
Which of the following is not true regarding mRNA splicing and mRNA export from the nucleus?
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15. Gene Expression
Eukaryotic RNA Processing and Splicing
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What are the functions of the poly-A tail on a mature eukaryotic mRNA?
A
It acts as a signal for mRNA splicing.
B
It facilitates the binding of ribosomes for translation.
C
It enhances the stability of the mRNA molecule.
D
It is involved in the transport of mRNA out of the nucleus.
Verified step by step guidance1
Understand the structure of a mature eukaryotic mRNA, which includes a 5' cap, coding region, and a poly-A tail at the 3' end.
Recognize that the poly-A tail is a sequence of adenine nucleotides added to the 3' end of the mRNA after transcription.
Learn that one of the primary functions of the poly-A tail is to enhance the stability of the mRNA molecule by protecting it from enzymatic degradation.
Explore how the poly-A tail also plays a role in the transport of mRNA from the nucleus to the cytoplasm, where translation occurs.
Note that while the poly-A tail is important for mRNA stability and transport, it does not directly facilitate ribosome binding or act as a signal for splicing.
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