Question

With a neat labelled diagram explain the structure of the nucleolus.

Answer 1

Four chief components of nucleolus structure are :

(i) An amorphous matrix or pars amorpha.

(ii) Chromatin containing abundant DNA.

(iii) Fibrils containing RNA, 80-100 Å in diameter, precursor of granules.

(iv) Granules- Ribonucleoprotein granules 150-200 Å in diameter.