Question

Nucleolus is formed from

• A. Nucleus
• B. Nuclear sap
• C. Sat chromosome
• D. Giant chromosome.

Answer 1

The correct option is C Sat chromosome

• The nucleolus is a small, dense and spherical structure present in the nucleus of the cell that is visible during the interphase of the cell division under the microscope.
  
• This region is dense due to the presence of proteins, DNA and RNA which are formed from specific chromosomal regions called nucleolar organizing regions.
• Satellite chromosomes are those chromosomes which have secondary constrictions other than a centromere that is attached to the chromosome by a thin thread called chromatin.
  
• These constrictions on the chromosomes correspond to nucleolar organizer region which helps to form the dense nucleolus.
  
• So, the correct answer is 'Sat chromosome'.