Question

Ribosomal RNA is actively synthesised in
A) Nucleoplasm
B) Ribosomes
C) Endoplasmic reticulum
D) Nucleolus

Answer 1

Hint: Ribosomal RNA are also called as rRNA. They associate with set of proteins to form ribosomes. It is very necessary for the amino acid synthesis.

Complete Answer:
RNA is found in ribosomes. Ribosomes are made up of two units 50s and 30s. This subunits are made up of rRNA. Ribosomal RNA is the part of protein synthesizing organelle called the ribosomes. There are three types of RNA- rRNA, mRNA, tRNA
Ribosomal RNA is synthesised in the dense area of the nucleus called the nucleolus. Nucleolus has genes which codes for rRNA. It is exported to the cytoplasm tRNA which helps in translation of protein in messenger RNA. The synthesized rRNA is transported out of the nucleus through nuclear pore.
Nucleoplasm- It is the matrix present in the nucleus. Its function is to store DNA.
Ribosomes- These are small particles which along with RNA form protein. They are present associated with the Endoplasmic reticulum.
Endoplasmic reticulum- It is found in the eukaryotic cell. It is associated with the ribosome called the rough endoplasmic reticulum. Its main function is synthesis, folding, modification and transport of protein.

The correct answer is (D). Ribosomal RNA is actively synthesised in Nucleolus.

Note:rRNA is a part of the ribosome. Ribosomes are responsible for protein synthesis. rRNA reads the order of amino acids and links amino acids together.