The regions of the heterogeneous nuclear RNA that must be spliced out to form functional RNA are called:

Question

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Introns are spliced from the mRNA before the mRNA leaves the nucleus.
A promoter site is a sequence of DNA that specifies the beginning of a gene.
In eukaryotes,many RNA sequences are removed by nuclear enzymes; the sequences that are left to code for proteins are called exons.
In translation,RNA directs the synthesis of a polypeptide,a cloverleaf-shaped strand of about 80 nucleotides.The tRNA molecule has a site where an amino acid attaches.The three-nucleotide sequence at the opposite side of the cloverleaf is called the anticodon.

The Regions of the Heterogeneous Nuclear RNA That Must Be