31.Which of the following statements is/are TRUE? (A) Interactions with the cytoskeleton enhance the mobility of integral membrane proteins. (B) Lipid-binding motif in peripheral proteins interact with polar head groups of membrane phospholipids. (C) Most lipids and a few proteins are laterally mobile in the plasma membrane. (D) Membrane-embedded b sheets are the primary secondary structures in most trans-membrane proteins. (E) All trans-membrane proteins are asymmetrically oriented in the bilayer.