f08 bio202 mt2 version 1

f08 bio202 mt2 version 1 - Exam Name MULTIPLE CHOICE Choose...

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Unformatted text preview: Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1 Accordin g to the fluid mosaic model of cell membran es, which of the following is a true statement about membran e phospholi pids? 1) _____ They occur in an uninterrupted bilayer, with membrane proteins restricted to the inner and outer surfaces of the membrane. They can move laterally along the plane of the membrane. They have hydrophilic tails in the interior of the membrane. They frequently flip- flop from one side of the membrane to the other. They are free to leave from the membrane and dissolve in the surrounding solution. In order for a protein to be an integral membran e protein, it would have to be which of the following ? 2) _____ hydrophilic exposed on only one surface of the membrane amphipathic hydrophobic completely covered with glycolipids What kinds of molecule s pass through a cell membran e most easily? 3) _____ monosaccharides such as glucose molecules that are small and hydrophobic molecules that are large and polar molecules that are large and hydrophobic molecules that are negatively charged Which of the following types of molecule s are the major structural compone nts of the cell membran e? 4) _____ phospholipids and glycolipids glycoproteins and phosphoproteins nucleic acids and integrins actin and tubulin phospholipids and proteins The sodium- potassiu m pump is called an electroge nic pump because it 5) _____ pumps hydrogen ions out of the cell. is used to drive the transport of other molecules against a concentration gradient. ionizes sodium and potassium atoms. pumps equal quantities of Na + and K + across the membrane. contributes to the membrane potential. Where does the Calvin cycle take place? 6) _____ cytoplasm surrounding the chloroplast thylakoid membrane chlorophyll molecule stroma of the chloroplast outer membrane of the chloroplast Glucose diffuses slowly through artificial phospholi pid bilayers. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose- rich food into their glucose- poor cytoplas m. Using this informati on, which transport mechanis m is most probably functioni ng in the intestinal cells? 7) _____ active transport pumps hypertonic transport facilitated diffusion osmosis simple diffusion Which of the following statement s is correct about diffusion ? 8) _____...
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  • Spring '07
  • O'Neal
  • carbon  dioxide, citric acid  cycle, electron  transport chain, receptor  tyrosine  kinase, fresh  water

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f08 bio202 mt2 version 1 - Exam Name MULTIPLE CHOICE Choose...

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