The regions of the heterogeneous nuclear RNA that must be spliced out to form functional RNA are called:
A) promotor sites.
B) introns.
C) exons.
D) anticodon.

Question

Quizplus · Accepted Answer

The regions of the heterogeneous nuclear RNA that must be spliced out to form functional RNA are called introns. Promotor sites are regions of DNA that initiate transcription. Exons are the regions of RNA that remain after splicing and code for the final protein product. Anticodons are sequences of nucleotides in tRNA that pair with the codons in mRNA during translation.

The Regions of the Heterogeneous Nuclear RNA That Must Be