The primary RNA transcript is:
A)tRNA before it forms its hairpin loops
B)rRNA before it forms the ribosome
C)mRNA after the introns have been removed
D)mRNA before the introns have been removed
E)mRNA before the exons have been removed

Question

Quizplus · Accepted Answer

The primary RNA transcript is the initial transcript of RNA that is synthesized from DNA. In eukaryotes, this transcript contains both introns and exons. The mRNA is produced from this transcript by removing the introns and ligating the exons together. Therefore, the primary RNA transcript is mRNA before the introns have been removed. Choices A and B are incorrect because they refer to other types of RNA, not the primary transcript. Choices C and E are incorrect because they describe mRNA after processing, not the primary transcript.

The Primary RNA Transcript Is