Biology

The correct answer is: D.Nucleolus

The nucleolus is a structure inside the nucleus where ribosomal RNA (rRNA) is synthesized. In addition to synthesizing rRNA, the nucleolus also plays a key role in the assembly of ribosomal subunits. These subunits, which are made of rRNA and proteins, are then transported out of the nucleus to the cytoplasm, where they combine to form functional ribosomes involved in protein synthesis.

Here’s why the other options are incorrect:

A.Endoplasmic reticulum: The endoplasmic reticulum (ER) is involved in protein and lipid synthesis, and in the case of rough ER, it...