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NTA Abhyas NEET2020BotanyCell - The Unit of LifePractice

Nucleolus usually associates with chromatin (or chromosomes) at a specific site called

Options

  1. ANucleolar organiser region (NOR)
  2. BChromosome
  3. CNucleoplasm
  4. DNuclear membrane

Correct answer

A. Nucleolar organiser region (NOR)

Step-by-step solution

Nucleolar organizer region present on chromosome helps in the reappearance of nucleolus after cell division. The number of NOR in a cell corresponds to the number of nucleoli present in the nucleus of the cell. In a human cell, NOR occurs on chromosomes 13,14,15, 21 and 22.

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