Using Live-Cell Fluorescence Microscopy, Researchers Observed That a Red Fluorescent

question 45

Multiple Choice

Using live-cell fluorescence microscopy, researchers observed that a red fluorescent spot moved from the plasma membrane into the interior of target cells when red fluorescent dye-labeled HIV was added to the cells. What is the best conclusion from these observations?

• A) The hypothesis that HIV enters the cell via fusion with the target cell plasma membrane is proved.
• B) The hypothesis that HIV enters the cell via fusion with the target cell plasma membrane is not supported.
• C) The hypothesis that HIV enters the cell via endocytosis is proved.
• D) The hypothesis that HIV enters the cell via endocytosis is not supported.
• E) Neither hypothesis is supported by these results.

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