Cell Structure and Function Exam



Cell Structure and Function Exam Circle the letter of the BEST answer. Good luck! The dispersal of ammonia fumes from a broken bottle of cleaning fluid is an example ofA. diffusion B. osmosis C. active transport D. pinocytosisWhich structure regulates what enters and leaves the cell?A. nucleus B. cell wall C. nuclear envelop D. cell membraneThe fundamental structure of the plasma membrane is determined almost exclusively by:A. phospholipid moleculesC. transport proteinsB. cholesterol moleculesD. carbohydrate moleculesA plasma membrane is considered semi-permeable if it allowsA. all materials to pass throughC. material to go in, but not outB. only some materials pass throughD. materials to go out, but not inAnimal cells do not containA. nuclei B. vacuoles C. cell walls D. cell membranesA bone cell has a high content of calcium, yet wants to absorb even more calcium in order to become stronger. The movement of more calcium in would be done byA. active transport B. osmosis C. diffusion D. facilitated transport--- have the ability to convert solar energy into chemical energy and store it in food.A. nucleoli B. mitochondria C. chloroplasts D. lysosomesThe movement of glucose into and out of cells through protein channels in the cell membrane is an example ofA. facilitated diffusion B. osmosis C. active transport D. endocytosisIf a 10% sucrose solution within a semipermeable sac causes the fluid volume in the sac to increase a given amount when the sac is immersed in water, what can be said about the water relative to the sac?A. The water is hypertonic to the sac.B. The water is hypotonic to the sac.C. The water is isotonic to the sac.D. The water is impermeable to the sac.Endocytosis and exocytosis are both considered forms of --- because they use ---.A. osmosis, water C. passive transport, energy B. active transport, energy D. facilitated transport, carrier moleculesThe diffusion of water is best known asA. osmosis B. endocytosis c. exocytosis D. facilitated diffusionFor diffusion to occur, there must beA. transport proteins in the cell membraneB. concentration differenceC. energyD. semipermeable membraneThe movement of substances from an area of low concentration to an area of high concentration is known asA. dissolving B. osmosis C. diffusion D. active transportFishmoore City Cell Analogy Read the following short description of a very special town called Fishmoore City. Then, match the parts of the city (underlined) with the parts of the cell listed below.In a far away place called Fishmoore City, the main export and production product is the magnificent widget. Everyone in the town has something to do with widget making and the entire town is designed to build and export widgets. The town hall has the instructions for widget making. Widgets come in all shapes and sizes and any citizen of Fishmoore can get the instructions and begin making their own magnificent widgets. Widgets are generally produced in small shops around the city. These small shops are built by the carpenter’s union (whose headquarters are in town hall). The widget shops are located on a maze of streets that wind throughout Fishmoore City.After a widget is constructed, they move on special widget carts through the maze of streets which can deliver the widget anywhere in the city. In order for a widget to be exported it will travel to the postal office where stamps are added and the widgets are labeled for export. But sometimes widgets don’t turn out right, and the “rejects” are sent to the scrap yard where they are broken down for parts or destroyed altogether. The town powers the widget shops from a hydraulic dam that is in the city. The entire city is enclosed by a large wooden fence, only the postal trucks (and citizens with proper passports) are allowed outside the city.14. mitochondria = __________________________15. ribosomes = __________________________16. nucleus = __________________________17. endoplasmic reticulum = ______________________18. Golgi apparatus = _______________________19. protein = ____________________20. cell membrane = _______________________21. lysosomes = _______________________22. nucleolus = _______________________Answer the questions below using complete sentences. Be sure to answer all parts of the question. 23. Suppose you were to add a drop of blue ink to a beaker of water and allow it to remain undisturbed for a few hours. After this time, you notice that the water is uniformly blue. How do you explain this?24. Compare and contrast active transport and passive transport. Be specific and use examples.25. Why does a fresh water protozoan require a contractile vacuole that constantly works to pump out water? ................
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