Which of the following is a possible intermediate during pre-rRNA processing?
A) An RNA molecule containing 18S + 5.8S rRNAs
B) An RNA molecule containing 5.8S + 28S rRNAs
C) An RNA molecule containing 5S + 28S rRNAs
D) An RNA molecule containing 18S + 28S rRNAs

Question

Quizplus · Accepted Answer

During pre-rRNA processing, an RNA molecule containing 5.8S + 28S rRNAs serves as an intermediate that is further processed to generate mature 5.8S and 28S rRNAs. Both of these rRNAs are transcribed as a single precursor molecule, and are then processed to their mature forms by endonucleolytic cleavage and exonucleolytic trimming. The 5.8S rRNA is located between the 18S and 28S rRNAs, but is not produced separately as an intermediate during pre-rRNA processing. The 18S and 5S rRNAs are also produced as separate molecules during pre-rRNA processing.

Which of the Following Is a Possible Intermediate During Pre-RRNA