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Question

The nucleolus is the site of formation of

A
spindle fibres
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B
chromosomes
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C
r-RNA
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D
peroxisomes
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Solution

The correct option is C r-RNA
Nucleolus was discovered by Fontana (1781) and given name by Bowman (1840). It does not have membrane and is attached to chromatin at nucleolar organiser region (NOR). Nucleolus is the site for ribisomal RNA (r-RNA) synthesis and synthesis of ribsomes, hence called ribosomal factory.

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