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Which Statement About Transmembrane Proteins Is True?
A) They Cross α\alpha

Question 109

Multiple Choice

Which statement about transmembrane proteins is true?


A) They cross the membrane only once.
B) The signal sequences are always cleaved off.
C) They usually have one or more α\alpha helices spanning the membrane bilayer.
D) They are always inserted with the amino terminus on the lumenal side and the carboxyl terminus in the cytosol.

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