Anatomy & Physiology Question #5


Which are the cellular structures responsible for protein synthesis and transcription?


  1. Golgi apparatus
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  2. Mitochondria
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  3. Cytosol
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  4. Ribosomes
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The correct answer is D. A ribosome is a complex macromolecule composed of structural and catalytic rRNAs, and many distinct polypeptides. Ribosomes are found in practically every cell, although they are smaller in prokaryotic cells.When mRNA is translated, a cell must invest energy to build each of its ribosomes. Protein synthesis is essential for all cells but does not include the Golgi apparatus, mitochondria or cytosol in the production.

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