Aresearcher is using a modified version of frap. she has devised a technique that allows her to label all the peripheral membrane proteins with a fluorescent tag, and has bleached a specific area of the cell membrane. after 24 hours, she notices that fluorescence has returned to the bleached area. what can she deduce from this experiment? a. peripheral membrane proteins are akin to integral membrane proteins. b. peripheral membrane proteins may not be permanently associated with the cell membrane. c. peripheral membrane proteins—like transmembrane proteins—are located within the cell membrane. d. peripheral membrane proteins can move freely within the cell membrane. e. peripheral membrane proteins can both move freely within the cell membrane and are akin to integral membrane proteins