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B. RNA Processing

A diagram of circle containing a single strand of R-N-A. The R-N-A is shown being spliced.
A diagram of a circle with a single strand of helix in red with a sequence of irregularly spaced green squares superimposed on it. A downward pointing arrow labeled R-N-A Splicing appears below the strand. The arrow is marked with the letter B. It points to a red rectangle made up of the red segments of the previous strand with an orange ball attached to the left-hand side.

In eukaryotes, RNA transcripts are first processed into mRNA. Then mRNA is exported out of the nucleus for translation.

Inhibiting RNA processing is probably not a major way to regulate gene expression.

Part of RNA processing involves removing introns and splicing exons together. While not directly related to the mechanisms of regulating gene expression, alternative splicing, in which different exons are spliced together, is important for enriching the pattern of gene expression in eukaryotes.