CBSE Class 11-science Answered

Ribosomes generally consist of a large subunit and a small subunit which fit together through non-covalent interaction. The large and small subunits are each made up of specialized RNA known as ribosomal RNA and dozens of distinct proteins. A ribosome dimer refers to the complex formed by the large and small subunit of the ribosome.

In some bacterial species such as Escherichia coli, ribosome dimers are a translationally inactive form of ribosomes.