Question Detail
Question
The nucleolar organiser is located on the chromosome in the region of
Correct Answer
Option B is the correct answer.
Detailed Explanation
The nucleolar organizer region (NOR) is located at a secondary constriction on a chromosome. It contains the genes for ribosomal RNA (rRNA) and is responsible for nucleolus formation during interphase. The primary constriction is the centromere, the kinetochore is the protein structure at the centromere, and telomeres are the ends of chromosomes.
Hint
Think about which chromosomal constriction is associated with the formation of the nucleolus.