Which of the following statements is TRUE of membranephospholipids? a. The hydrophilic head groups face the interior portion fothe membrane b. The hydrophobic tail groups face the exterior portionof the membrane c. The spontaneously flip-flop from one side of the membraneto the other d. They freely move laterally within the membrane e. They rarely flip-flop across or move laterally within themembrane Which of the following statements is TRUE of membranephospholipids? a. The hydrophilic head groups face the interior portion fothe membrane b. The hydrophobic tail groups face the exterior portionof the membrane c. The spontaneously flip-flop from one side of the membraneto the other d. They freely move laterally within the membrane e. They rarely flip-flop across or move laterally within themembrane
Explanation / Answer
e. They rarely flip-flopacross or move laterally within the membrane Thehydrophillic head of the phospholipid faces the exterior surface ofthe membrane. Thehydrophobic tail of the phospholipid faces the interiorsurface of the membrane. Theydonot flip flop in the membrane. Hencethese three options are ruled out. Theoption D is right as the phospholipids freely movelaterally within the membrane. But asthe option E has two events in it like, that they rarely flip-flopand move laterally within the membrane; this is thebest choice.