Multiple Choice
Which of the following are post-transcriptional modifications of mRNA?
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15. Gene Expression
Eukaryotic RNA Processing and Splicing
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Which of the following is a result of alternative splicing in eukaryotic cells?
A
Increased mutation rate in the DNA sequence
B
Enhanced stability of mRNA molecules
C
Inhibition of transcription initiation
D
Production of multiple protein isoforms from a single gene
Verified step by step guidance1
Understand that alternative splicing is a process during gene expression that allows a single gene to code for multiple proteins.
Recognize that during alternative splicing, different combinations of exons are joined together, or certain exons are skipped, resulting in different mRNA transcripts from the same pre-mRNA.
Consider the implications of alternative splicing: it increases the diversity of proteins that can be produced by a single gene without altering the DNA sequence itself.
Note that alternative splicing does not directly affect the mutation rate of DNA, the stability of mRNA, or the initiation of transcription. Instead, it affects the variety of proteins produced.
Conclude that the primary result of alternative splicing is the production of multiple protein isoforms from a single gene, allowing for greater functional diversity in proteins.
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