12. What is hnRNA? Where does it form? Name the enzyme involved in the synthesis of hnRNA. Whyis it to be processed? Explain. (3)

12. What is hnRNA? Where does it form? Name the enzyme involved in the

1.	12. What is hnRNA? Where does it form? Name the enzyme involved in the synthesis of hnRNA. Whyis it to be processed? Explain. (3)
Answer» HnRNA stands for heterogeneous nuclear RNA. As its name suggests, hnRNA is a term that encompasses various types and sizes of RNAs found in the eukaryotic cell nucleus. As you likely know, RNAs exist in many forms and carry out a wide range of functions. Messenger RNA (mRNA) is the only type of RNA that codes for proteins. Other types of RNA in eukaryotic cells include: ribosomal RNA (rRNA), transfer RNA (tRNA), small nuclear RNA (snRNA), micro RNA (miRNA), small interfering RNA (siRNA), and small nucleolar RNA (snoRNA).