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D103 sample midterm from f2007_post-HO

D103 sample midterm from f2007_post-HO - Bio D103 Cell...

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Bio D103: Cell Biology Dr. Salme Taagepera MULTIPLE CHOICE (2 points each) 1. Which of the following statements about glycosylation is NOT correct? A) Glycosylation promotes proper folding of proteins in the ER B) Glycosylated proteins are found in the nucleus C) Glycosylation stabilizes proteins on the membrane surface D) Glycosylation can be initiated in the Golgi through O-linked glycosylation E) The initial sugar unit added to proteins in the ER is partly synthesized in the cytosol 2. The following is FALSE about eukaryotic lipid bilayers: 3. Action potentials are unidirectional because A) Ligand-gated K+ channels are only stimulated at one end of the neuron B) Voltage-gated Na+ channels open quickly C) Voltage-gated K+ channels open slowly D) Voltage-gated Na+ channel undergoes a refractory state E) B, C and D 4. According to the FRAP data below, what fraction of labeled membrane proteins are diffusing freely? © 2007 Salme Taagepera, PhD All rights reserved. 1
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Bio D103: Cell Biology Dr. Salme Taagepera 5. Which of the following proteins is NOT involved in the retrieval of ER resident proteins?
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