Multiple Choice
In the context of Golgi processing and transport, which organelle is most often referred to as the "post office" of the cell because it modifies, sorts, and packages proteins and lipids for delivery to their destinations?
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13. Intracellular Protein Transport
Golgi Processing and Transport
Multiple Choice
In the context of Golgi processing and transport, which organelle is often described as the cell’s “post office” because it modifies, sorts, and packages proteins and lipids for delivery to their destinations?
A
Golgi apparatus
B
Rough endoplasmic reticulum
C
Mitochondrion
D
Lysosome
Verified step by step guidance1
Understand the role of each organelle listed in the problem: the Golgi apparatus, rough endoplasmic reticulum, mitochondrion, and lysosome.
Recall that the rough endoplasmic reticulum (RER) is primarily involved in the synthesis of proteins, especially those destined for secretion or membrane insertion, but it does not perform extensive modification or sorting.
Recognize that mitochondria are the powerhouses of the cell, responsible for producing ATP through cellular respiration, and are not involved in protein processing or sorting.
Know that lysosomes are involved in degradation and recycling of cellular waste materials, not in packaging or sorting proteins for delivery.
Identify the Golgi apparatus as the organelle that modifies proteins and lipids received from the ER, sorts them, and packages them into vesicles for delivery to their correct destinations, which is why it is often called the cell’s 'post office'.
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