A mutation in a eukaryotic cell line prevents the addition of a 5′ cap to pre-mRNA transcripts. Which of the following is the most likely consequence of this mutation based on the mRNA structure and function shown in the image?

Question

Accepted Answer

The mRNA will degrade quickly in the cytoplasm and will not be efficiently translated due to loss of protection and ribosome binding signals.

Answer

The protein-coding region of the mRNA will be extended, producing a longer-than-normal polypeptide.

Answer

The mRNA will lack a start codon and therefore will not be recognized by the ribosome.

Answer

The absence of the 5′ cap will result in incomplete splicing of introns during transcription.

Answer

The resulting mRNA will be translated more efficiently since the ribosome binds directly to the poly-A tail instead.

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A mutation in a eukaryotic cell line prevents the addition of a 5′ cap to p...

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