Biochemistry General 7e6ff31f Which of the following phospholipid serves as a marker of apoptosis A Phosphatidylinosital B Phosphatidyl serine C Phosphatidyl choline D Phosphatidyl ethanolamine High-Yield Explanation Phosphatidyl serine is normally present on inner mitochondrial membrane, flipping of it to the outer mitochondrial membrane is seen in apoptosis.