Here's why:

* Universality: All living organisms, from bacteria to humans, need proteins to function. Proteins are the workhorses of cells, carrying out a vast array of tasks like:

* Enzymes: Catalyzing chemical reactions

* Structural components: Providing shape and support

* Signaling molecules: Communicating within and between cells

* Transport proteins: Moving molecules across membranes

* Central Dogma: The process of protein synthesis follows the same fundamental principle (the central dogma) in all organisms:

* DNA: Contains the genetic code for proteins

* Transcription: DNA is transcribed into messenger RNA (mRNA)

* Translation: mRNA is translated into a protein by ribosomes

While there might be slight variations in the details of protein synthesis between different organisms, the core principle remains consistent. This universal process is a testament to the shared evolutionary history of all life on Earth.