What is the main function of the nucleolus?
A) Site of synthesis of ribosomal protein.
B) Site of synthesis of ribosomal RNA.
C) Site of synthesis of DNA which directs formation of transfer RNA.
D) Site of synthesis of messenger RNA.
E) Site of messenger RNA translation.

Question

Quizplus · Accepted Answer

The main function of the nucleolus is to synthesize ribosomal RNA (rRNA) and assemble ribosomes. Ribosomes are the cellular structures responsible for protein synthesis, and the nucleolus plays a crucial role in their formation. Although ribosomal proteins are also involved in this process, they are not synthesized in the nucleolus. Transfer RNA (tRNA) is synthesized in the nucleus but not in the nucleolus, and messenger RNA (mRNA) is transcribed from DNA in the nucleus but is not synthesized in the nucleolus. The nucleolus is also not directly involved in mRNA translation, which takes place in the cytoplasm.

What Is the Main Function of the Nucleolus