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Which of the following is not a component of cell membranes?

(a) Phosphodiglycerides

(b) Sphingolipids

(c) Cholesterol

(d) Phosphotriglycerides

This question was posed to me in examination.

Asked question is from Chemical Composition of Membranes topic in chapter Cellular Membranes of Cell Biology

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Correct option is (d) Phosphotriglycerides

The explanation is: Phospholipids present in cell membrane are diglycerides and not triglycerides. Triglycerides have three fatty acids and are not ampipathic in nature. It also consists of sphingolipid and cholesterol.

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