Question

Which of the following is true for nucleolus?

• A. It takes part in spindle formation.
• B. Larger nucleoli are present in dividing cells.
• C. It is a site for active ribosomal RNA synthesis.
• D. It is a membrane-bound structure.

Answer 1

The correct option is C It is a site for active ribosomal RNA synthesis.

• Nucleolus is the spherical structure present in the nucleoplasm.
  
• It is not membrane-bounded and thus its content is continuous with nucleoplasm. It gets disappear during cell division.
  
• But it provides the site for ribosomal RNA synthesis and also takes part in protein synthesis.
  Hence, option C is correct.