What is the relation between nucleolar organiser region and nucleolus?

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Solution

A chromosomal region around which the nucleolus forms. This region is the particular part of a chromosome that is associated with a nucleolus after the nucleus divides.The nucleolus organiser regions of chromosomes, which harbour the genes for pre‐rRNA, are the foundation for the nucleolus.

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Nucleolus organizing region is

(a)	tRNA	1.	Linking of amino acids
(b)	mRNA	2.	Transfer of genetic information
(c)	rRNA	3.	Nucleolar organising region
(d)	Peptidyl transferse	4.	Transfer of amino acid from the cytoplasm to the ribosome

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