複選題29. Many proteins function in conjunction with lipid membrane Which of the following statement(s) about the protein components of biomembrane is/are correct? (A) Transmembrane proteins like ion channels, solute transporters are integrated into lipid bilayers. (B) Lipid anchored membrane proteins such as Ras, and Rab are covalently modified by lipid molecule and thereby associate with biomembrane (C) Peripheral membrane proteins are tethered to membrane by transmembrane proteins or lipid anchored proteins or by binding to lipid head groups. (D) Once proteins are associated with lipid membrane, they tend to stay within a fixed area, not moving laterally, on lipid membrane. (E) Clustering of membranous proteins could change local lipid composition of biomembrane.