Question

Which of the classes of RNA molecules is linked with proteins in forming the large and small subunits of a cytoplasmic structure?

• A. Ribosomal RNA
• B. Transfer RNA
• C. Messenger RNA
• D. Primary mRNA transcript

Answer 1

Answer: (A)

Ribosomal RNA

RNA (Ribonucleic acid) is a part of genetic material which consists of ribose sugar along with phosphates. The ribosomes are present in the cell cytoplasm. It is made up of two subunits, one is smaller (the 50S) and the larger (30S). Ribosomes consist of about 80% of the total rRNA which is linked with RNA molecules to form large and small ribosomal subunits. These subunits are of different sizes in eukaryotes and prokaryotes. They help in the synthesis of proteins.

So, the correct option is 'Ribosomal RNA'.