In a eukaryotic cell, which of the following enzymes is directly responsible for the transcription of heterogeneous nuclear RNA (hnRNA)?

Step-by-step solution

In eukaryotic cells, there are three major types of RNA polymerases, each responsible for synthesizing different types of RNA: RNA polymerase I transcribes ribosomal RNAs (rRNAs), specifically 28S, 18S, and 5.8S. RNA polymerase II transcribes the precursor of messenger RNA (mRNA), which is known as heterogeneous nuclear RNA (hnRNA). RNA polymerase III is responsible for the transcription of transfer RNA (tRNA), 5S rRNA, and small nuclear RNAs (snRNAs). Therefore, RNA polymerase II is directly responsible for the tr