What holds the ribosomes together in a polysome ?

Explanation

### Step-by-Step Solution:

1. **Understanding Polysomes**: A polysome, also known as a polyribosome, is a complex formed by multiple ribosomes attached to a single mRNA molecule. This structure allows for the simultaneous translation of the mRNA into proteins.

2. **Components of a Polysome**: The main components of a polysome are mRNA and ribosomes. The ribosomes are the sites of protein synthesis, while the mRNA carries the genetic information from DNA.

3. **Role of mRNA**: The mRNA serves as the template that ribosomes read to synthesize proteins. It holds the sequence of nucleotides that dictate the order of amino acids in a protein.

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