Multiple Choice
Which organelle modifies and packages proteins for secretion in the endomembrane system?
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5. Cell Components
Endomembrane System: Protein Secretion
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Which of the following is a function of the rough endoplasmic reticulum?
A
Synthesis of proteins destined for secretion
B
Detoxification of harmful substances
C
Production of ATP through cellular respiration
D
Storage of genetic information
Verified step by step guidance1
Understand the structure and function of the rough endoplasmic reticulum (RER). The RER is characterized by the presence of ribosomes on its surface, which are essential for protein synthesis.
Recall that the ribosomes attached to the RER synthesize proteins that are destined for secretion, incorporation into the cell membrane, or use in lysosomes. This is a key function of the RER.
Eliminate options that do not align with the function of the RER. For example, detoxification of harmful substances is primarily a function of the smooth endoplasmic reticulum (SER), not the RER.
Recognize that ATP production through cellular respiration is a function of the mitochondria, not the RER. Similarly, storage of genetic information is a function of the nucleus, not the RER.
Conclude that the correct function of the rough endoplasmic reticulum is the synthesis of proteins destined for secretion, based on its structural and functional characteristics.
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