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of the following is necessary for protein synthesis?

  1. hromosomes

  2. ellular respiration

  3. iruses

  4. ibosomes

The correct answer is: ibosomes

Protein synthesis is the process of making proteins from amino acids. Ribosomes are the cellular structures responsible for this process, making them necessary for protein synthesis. Chromosomes, viruses, and cellular respiration do not play a direct role in protein synthesis. Chromosomes contain the genetic information required for protein synthesis, viruses are not able to replicate in the same way that cells do, and cellular respiration is the process of producing energy for cells, not building proteins. Therefore, none of these options are necessary for protein synthesis.