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How does the primary transcript in the nucleus of a prokaryotic cell compare to the functional mrna?

A) the primary transcript is larger than the mrna
B) the primary transcript is smaller than the mrna
C) the primary transcript and the mrna both contain introns
D) the primary transcript is the same size as the mrna

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BioWizard

Answer:

None of the answers is correct, because prokaryotic cell doesn't have nucleus

Explanation:

In eukaryotic cell, primary transcript is RNA synthesized via transcription in the nucleus. After processing it becomes mature mRNA. The processes of processining are addition of the 5' cap, 3'-polyadenylation, and alternative splicing (excision of introns). Because during the processing of RNA introns are removed the primary transcript is larger than the mRNA.