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26 June, 07:16

Eukaryotic 45S RNAcontains 3 RNAs. Identify the 3

products in order of

transcription.

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Answers (1)
  1. 26 June, 09:37
    0
    The three rRNA products are:

    18S rRNA 5.8S rRNA 28S rRNA

    Explanation:

    The eukaryotic 45S RNA is a combination of 3 smaller rRNA trancripts separated by RNA spacers. The 45 rRNA is transcribed by RNA Polymerase 1 from the gene of the same name as a whole. It is a pre-cursor RNA that undergoes nucleolytic cleavage by specific RNA endonucleases into the three products: an 18S, 5.8S and 28S rRNA. The 18S rRNA and ribosomal proteins constitute the 40S subunit of the eukaryotic ribosome. The 5.8S, 28S and another 5S rRNA constitute the 60S subunit.
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