Base Your Answers to the Questions Below on the Following

question 28

Multiple Choice

Base your answers to the questions below on the following information:
You have isolated a factor from the blood of a space alien and named it XFF (for X- files factor) . Based on preliminary data, you think that XFF could be one of three compounds normally found in human blood: epidermal growth factor (EGF) , epinephrine, or estrogen.
-After determining which preparation contained the XFF receptor, you wish to determine the properties of the ligand receptor. Using a radioactive XFF, you wish to determine if the properties are similar to that of epinephrine and the epinephrine receptor. If so, you expect to find the radioactive XFF

• A)associated with mitochondria.
• B)in the nucleus.
• C)associated with the ER.
• D)on the cell surface.
• E)within the cell.

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