alleryStart learning →What is true of the intron sequences of a eukaryotic gene?
AThey encode the first part of a protein
BThey are the only part that is translated
CThey do not encode functional proteins
DThey are added to the transcript by an enzyme
Answer & Solution
Correct answer: C. They do not encode functional proteins
1. A eukaryotic gene is built of exons, which are expressed, and introns, which intervene between them.
2. Intron sequences do not encode functional proteins.
3. They are cut out during processing while the exons are rejoined, so only exon sequence reaches the ribosome.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.4 RNA Processing in Eukaryotes_
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