Dna

Non-transcribed space gene for 45S RNA

gene for 45S RNA

gene for 45S RNA

gene for 45S RNA

gene for 45S RNA

gene for 45S RNA

FIGURE 6.16 Clusters of Ribosomal RNA Genes

The genes for rRNA are located at multiple sites along the DNA. A single transcribed unit of DNA yields an initial RNA molecule of 45S. The 45S RNA is processed to yield the final 18S and 28S subunits of rRNA.

Transcription

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