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What is the role of ribosomes in the cell?

  1. Building and repairing proteins

  2. Regulating what enters and leaves the cell

  3. Storing genetic information

  4. Transcribing genetic information

The correct answer is: Building and repairing proteins

Ribosomes play a crucial role in protein synthesis, which is the process of creating new proteins. Therefore, option A is the correct answer. Option B is incorrect because that is the role of the cell membrane, not ribosomes. Option C is incorrect because that is the role of the nucleus. Option D is incorrect because that is the role of the nucleus or RNA polymerase, not ribosomes.