Here's a breakdown:
* DNA: The nucleolus contains a specific region of DNA called the nucleolar organizer region (NOR). This region carries the genes for ribosomal RNA (rRNA).
* RNA: The nucleolus is the site of rRNA synthesis and assembly of ribosomes. rRNA is transcribed from the DNA in the NOR and then combined with ribosomal proteins to form ribosomal subunits.
Important Note: While both DNA and RNA are present in the nucleolus, the DNA is primarily involved in providing the genetic code for rRNA, while the RNA is actively involved in the synthesis and assembly of ribosomes.
