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BIS104_F10_Midterm_Sample

BIS104_F10_Midterm_Sample - BIS 104_F10(01_SampleMidterm...

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BIS 104_F10 (01)_SampleMidterm 10/22/10 1 Midterm Exam (Sample) Questions 1-4. The diagram below shows the various intracellular compartments involved in secretory/exocytic and endocytic pathways. Arrows indicate the directions of transport. Label the following compartments. 1. Early endosome A. (A) B. (B) C. (C) D. (D) E. (E) 2. Trans Golgi Network (TGN) A. (A) B. (B) C. (C) D. (D) E. (E) 3. Endoplasmic reticulum (ER) A. (A) B. (B) C. (C) D. (D) E. (E) 4. Secretory (transport) vesicle A. (A) B. (B) C. (C) D. (D) E. (E) Questions 5-9. TRUE (A)/FALSE (B) 5. Complementary Rab proteins on transport vesicles and target membranes bind to one another to allow transport vesicles to dock selectively at their appropriate target membranes. 6. Clathrin-coated vesicles can be formed from both the plasma membrane via endocytosis and the trans Golgi network (TGN). 7. A misfolded protein is selectively retained in the ER by binding to chaperone proteins. Only after it has been released from such a chaperone protein—and thus approved as properly folded— does a protein exit from the ER. 8. The nuclear envelope allows free passage of ions and single amino acids.
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