Which of the following is true for nucleolus?

Which of the following is true for nucleolus?
  1. It takes part in spindle formation
  2. It is a membrane-bound structure
  3. Larger nucleoli are present in dividing cells
  4. It is a site for active ribosomal RNA synthesis

Solution

The nucleolus is a naked, round or slightly irregular structure in the nucleus. It lacks a membrane and its contents are in direct contact with the nucleoplasm. It is a site for active ribosomal RNA (rRNA) synthesis.
Microtubules take part in the spindle formation. Mitochondria, vacuoles, and plastids. etc. are membrane-bound structures. The dividing cells possess a large number of mitochondria.

Asked in: NEET 2018

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