MCAT Biochemistry Question 109: Answer and Explanation
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Question: 109
4. Which of the following is NOT a function of the cell membrane?
- A. Cytoskeletal attachment
- B. Protein synthesis
- C. Transport regulation
- D. Second messenger reservoir
Correct Answer: B
Explanation:
Ribosomes are the site of protein synthesis within a cell and are not coupled to the cell membrane. The cell membrane functions as a site for cytoskeletal attachment, choice (A), through proteins and lipid rafts. Transport regulation, choice (C), is accomplished through channels, transporters, and selective permeability, while the phospholipids act as a reagent for second messenger formation, choice (D).