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In: Biology

Which of the following statements regarding Rab proteins is NOT true? A. Each of the over...

Which of the following statements regarding Rab proteins is NOT true? A. Each of the over 60 known Rab protein is associated with one or more membrane- enclosed organelles. B. Rab proteins interact with a variety of effector proteins that facilitate vesicle transport, membrane tethering, and fusion C. Rab proteins directly catalyze membrane fusion by expelling water molecules from the lipid bilayer interface Answer _________

24. Changes in non-covalent interactions are critical for signal transduction, which of the following statements regarding these interactions is NOT true: A. they can influence the amino acid sequence of a protein B. they can influence enzymatic activity C. they can influence protein-protein interactions D. they can influence protein-DNA interactions and transcription E. they can influence protein conformation Answer _________

25. COPI- and COPII-coated vesicles are most frequently associated with: A. the endocytosis of plasma membrane proteins B. vesicles that mediate transport between the ER and Golgi C. caveolin proteins D. the formation of lipid rafts Answer _________

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