Practice MCAT Question - Q74 - Answer!
In which organelle would proteins be modified by adding a carbohydrate component to the amino acid chains in order to form a glycoprotein?
A. Rough ER
B. Smooth ER
C. Golgi complex
D. Mitochondria
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The correct answer is (C). The rough ER is where proteins are made, whereas the smooth ER is where carbohydrates and/or lipids can be made. However, it is in the Golgi complex that two such components would be modified, combined, and packaged into a functional glycoprotein. The mitochondria could provide the ATP to carry out some of this work, but the work itself would take place in the Golgi complex.
