Radioactive Isotopes Are Used to Tag Proteins in the Cell

question 4

Multiple Choice

Radioactive isotopes are used to tag proteins in the cell membranes of mouse cells.These cells are then fused with human cells in cultures.What is the likely consequence of the tagged mouse proteins?

• A) The tagged proteins remain in the mouse cells and keep their position on the membrane.
• B) The tagged proteins remain in mouse cells but move anywhere across the mouse cell membrane.
• C) The tagged proteins drift across cell membranes and are soon found dispersed across both human and mouse cell membranes.
• D) None of these will occur since mouse cell membranes are unlike human cell membranes.
• E) None of these will occur since radioactive cells will soon die.

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Definitions:

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