The trunk of each 'Christmas tree' (a transcription unit) represents a DNA molecule; the tree branches (granular strings attached to the DNA) are RNA molecules that have been transcribed from the DNA.
Proceedings of the National Academy of Sciences of the United States of America, Vol. 75, No. 12 (Dec., 1978), pp. 6044-6048 (5 pages) UV transcription mapping with recombinant DNA probes containing ...
In eukaryotes, there are four rRNAs associated with ribosomes; these are the 18S, 5.8S, 28s, and 5S rRNAs. Production of the first three occurs within the nucleolus, whereas 5S rRNA production occurs ...
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