Which of the following is not a function of Smooth Endoplasmic Reticulum (SER)?
Correct answer: C. Synthesis of membrane proteins.
- A. Synthesis of steroid hormones from cholesterol.
- B. Synthesis of phospholipids for plasma membrane.
- C. Synthesis of membrane proteins.
- D. Synthesis of steroid hormones.
Explanation
The Smooth Endoplasmic Reticulum (SER) is primarily associated with lipid synthesis, including steroid hormones and phospholipids, and detoxification processes, while the Rough Endoplasmic Reticulum (RER) is distinguished by its ribosome presence, making it responsible for protein synthesis, particularly for membrane proteins. Therefore, the correct answer to the question is that the synthesis of membrane proteins is not a function of the SER, as this crucial task is performed by the RER. Options A, B, and D are functions of the SER, indicating their relevance to lipid metabolism and hormone production.
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