3[1]2._cell_structure

3[1]2._cell_structure - Biological Sciences 1A (Wheelis)...

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Biological Sciences 1A (Wheelis) Sample Exam—Cells Use the following answers for questions 1-9 a. the cell membrane b. the endoplasmic reticulum c. the golgi d. lysosomes e. mitochondria 1. The site of membrane protein synthesis in eukaryotes. 2. Found in both procaryotes and eucaryotes. 3. Responsible for sorting membrane material destined for different eukaryotic cell compartments. 4. Contains digestive enzymes for release into phagosomes. 5. The site of secretory protein synthesis in eucaryotes 6. The site of phospholipid synthesis in eukaryotes. 7. The site of most ATP synthesis in many eukaryotes. 8. The site of most recognition and adhesion proteins 9. Which one is NOT part of the endomembrane system? 10. The membranes of the eucaryotic cell exchange material a. by periodic fragmentation into tiny vesicles, and reformation by random fusion of vesicles b. because they are all physically continuous with each other c. by membrane vesicles budding and fusion d. by reversibly dissolving into the cytoplasm e. all of the above 11. Material moves from one organelle of the endomembrane system to another a. in membrane vesicles that bud from the originating membrane and fuse with the destination membrane b. by export to the cytosol through specific permeases, followed by uptake by the destination organelle by specific permeases c. by fusion of the originating and destination organelles d. by simple diffusion e. all of the above are mechanisms of material transport in the endomembrane system 12. Vesicles are moved through the eucaryotic cytoplasm by a. the contraction of microfilaments b. simple diffusion c. contraction and expansion of the whole cell, which stirs cellular contents d. motor proteins that move along microtubules e. the contraction of intermediate filaments
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Use the following answers for questions 13-18 a. microtubules b. intermediate filaments c. actin microfilaments 13. Involved in muscle contraction. 14. Makes up the nuclear lamina, a layer of protein under the nuclear envelope. 15. Involved in animal cell division. 16. Forms a filamentous scaffold immediately beneath the cell membrane, anchoring membrane proteins and helping to maintain cell shape. 17. Makes up the core of the eucaryotic flagellum. 18. Involved in the movement of vesicles inside the cell. Imagine that you give bacterial cells a large amount of radioactive iodine, then feed these bacteria to an amoeba. When the amoeba phagocytoses the bacteria and digests them, the iodine is released and it binds to the membrane proteins of the vesicle that encloses it. Excess iodine is released to the exterior by exocytosis. 19. What membrane would be the first to become radioactive? a. cell membrane b. phagosome membrane c. lysosome membrane d. phagolysosome membrane e. Golgi membrane 20. What would be the next membrane to become radioactive? a.
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3[1]2._cell_structure - Biological Sciences 1A (Wheelis)...

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