Fibrillar region of nucleolus which contains fibre of ribonulceoprotein is called ______________.

NOR

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Fibronema

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Nucleonema

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Pars amorpha

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Solution

The correct option is A NOR
NOR or Nucleolar Organizer Regions are certain regions that are found on the chromosomes which contains the genes for ribosomal RNA and helps in forming nucleoli. The NOR codes for 5.8S, 18S and 28S ribosomal RNA. It contains the ribonucleoprotein.
So,the correct option is 'A'.

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