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Which of the following mRNA will not be polyadenylated?

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Which of the following mRNA will not be polyadenylated?

(a) Actin mRNA

(b) Receptor mRNA

(c) Canonical histone mRNA

(d) Transport channel mRNA

The question was posed to me by my school principal while I was bunking the class.

This interesting question is from Post-Transcriptional Modification in section Gene Expression : Transcription Prokaryotes of Cytogenetics

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Correct option is (c) Canonical histone mRNA

For explanation: Most of the mRNAs are polyadenylated except the major histone mRNAs. These are the canonical mRNA that need a rapid turnover and have a unique 3’ end. However, the non-canonical mRNA produced during S phase are polyadenylated.

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