Question

4. In the plasma membrane, phosphatidylcholine is predominantly in the outer leaflet and phospbatidylseting is predominantly in the inner leaflet. This means that there is high flippase activity for phospbatidylsetine there is high flippuse activity for phosphatidylcholine phosphatidylcholine inserted into the outer leaflet and phospbatidylsetine inserted into the inner leaflet phosphatidylcholine inserted into the pancytoplasmic side of the ER membrane 5. Which of the following is(are) NOT true about phospholipid synthesis and distribution in a eukaryote? when a vesicle fuses with the plasma membrane, lipids that were cytosolie remain facing the cytosol newly synthesized phospholipids are inserted in to the lumen of the ER the Golgi is the primary site of phospholipid synthesis a)phospholipid asymmetry is due to flippass activity 6. Which isare) found exclusively on the extracellular face of the plasma membrane? phosphatidylserine b)Cholesterol Phosphatidylethanolamine d)Glycolipid

Answer 1

4. C.There is high flippase activity for phosphatidylcholine.

5. C.T golgi is the primary site of phospholipid synthesis.

Correct answer is cytosole is the primary site for phospholipid synthesis.

6. B. B.Cholesterol is found exclusively on extracellular face of plasma membrane.