RNA is absolutely essential during protein synthesis, serving as the intermediary between the genetic information stored in DNA and the construction of proteins. Here's why:

* DNA is the blueprint, but can't directly build proteins: DNA contains the genetic code, but it resides in the nucleus of the cell, protected and relatively immobile. It can't directly leave the nucleus and travel to the ribosomes, where proteins are made.

* RNA is the messenger: RNA, specifically messenger RNA (mRNA), is a copy of a gene's sequence that is made from DNA. mRNA can leave the nucleus and travel to the ribosomes.

* Ribosomes read the RNA instructions: Ribosomes are the protein-making factories of the cell. They read the mRNA sequence, which acts like a set of instructions, to assemble amino acids in the correct order to build a specific protein.

In short: DNA holds the code, but RNA is the messenger that brings the code to the ribosomes, where it's used to build proteins.

Here's a simple analogy:

* Imagine DNA is a recipe book in a locked safe (the nucleus).

* RNA is a copy of the recipe (mRNA) that you take out of the safe.

* Ribosomes are your kitchen (the site of protein synthesis) where you use the recipe to make a dish (the protein).

Without RNA, the recipe would remain locked away in the safe, and no protein could be made.