A Researcher Is Using a Modified Version of FRAP

question 177

Multiple Choice

A researcher 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 may not be permanently associated with the cell membrane.
• B)Peripheral membrane proteins-like transmembrane proteins-are located within the cell membrane.
• C)Peripheral membrane proteins can move freely within the cell membrane.
• D)Peripheral membrane proteins are akin to integral membrane proteins.
• E)Peripheral membrane proteins can both move freely within the cell membrane and are akin to integral membrane proteins.

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