A mutant strain of bacteria that has no ribosomes is incapable of protein synthesis. Here's why:

* Ribosomes are the protein factories of the cell. They are complex molecular machines responsible for translating the genetic code (mRNA) into proteins.

* Proteins are essential for virtually every cellular function. They act as enzymes, structural components, signaling molecules, and much more.

* Without ribosomes, the bacteria cannot create any new proteins. This would lead to a complete breakdown of cellular processes and ultimately, the death of the bacteria.

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