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Exam2_key - BIO 311C EXAM 2 Pick the one option that best...

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BIO 311C EXAM 2 Pick the one option that best completes the sentence or answers the question: 1) A chemoautotrophic bacteria: 1) A A) uses inorganic chemicals as energy source B) uses organic chemicals as energy source C) uses carbon dioxide as energy source D) uses light as energy source E) none of the above 2) Protein Y normally resides in the ER lumen. During its synthesis in they cytoplasm, if signal peptide was NOT added to protein Y, would this protein: A)stay in the ER membrane 2) C B)go directly to Golgi C)stay in the cytoplasm D) go to ER lumen anyway E)get phagocytosed 3) Which of the following would likely move through the lipid bilayer of a plasma membrane rapidly? 3) A 4)Which of the following lack membranes as part of their structure? 4) D 5) Your intestine is lined with individual cells. No fluids leak between these cells from the gut into your body. Why? 5) D 1
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6) What mechanisms do plants use to load up on sucrose produced by photosynthesis? 6) ___D____ A) a cotransport protein B) Na+/K+ pump C) a proton pump D) A and C only E) A, B, and C 7) Na+ diffuses across a cell’s plasma membrane down its: 7) D A) concentration gradient B) electrical gradient C) density gradient D) electrochemical gradient E) none of the above 8) All of the following membrane activities require energy from ATP hydrolysis except 8) __B_____ A) active transport B) facilitated diffusion C) transport of potassium into a cell by Na+/K+ pump D) proton pumps E) transport of Na+ out of the cell by Na+/K+ pump 9) Compound/s formed in the Miller-Urey experiment: 9) E 10) When a potassium ion (K + ) moves from the soil into the central vacuole of a cell on the surface of a root, it must pass through several cellular structures. Which of the following correctly describes the order in which these structures will be encountered by the ion? 10) _D_____ A) secondary cell wall → plasma membrane → primary cell wall → cytoplasm → tonoplast B) tonoplast → primary cell wall → plasma membrane → cytoplasm C) plasma membrane → primary cell wall → cytoplasm → tonoplast D) primary cell wall → plasma membrane → cytoplasm → tonoplast E) none of the above WE ARE ALSO GIVING POINTS FOR OPTION E AS THERE IS NO SECONDARY 2
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CELL WALL LISTED IN OPTION D.
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