When Membrane-Bound Receptors Like HER2 Bind to Molecules Outside of a Human

question 65

Multiple Choice

When membrane-bound receptors like HER2 bind to molecules outside of a human cell,they must move laterally within the bilayer and also bind to a second HER2 receptor,forming a dimer (2-part molecule) ,in order for the signal to be further tranferred inside the cell through the membrane.This is possible because the cell membrane is

• A) a fluid mosaic.
• B) hydrophobic.
• C) a selectively permeable barrier.
• D) rigid like a cell wall.
• E) both selectively permeable and a fluid mosaic.

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