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Cell Bio Unit 3 HW
| Question | Answer |
|---|---|
| Organisms that live in cold climates adapt to low temperatures by doing which of the following? | increasing the amounts of unsaturated fatty acids in their membranes to help keep their membranes fluid |
| When the transport vesicle shown below fuses with the plasma membrane, which monolayer will face the cell cytosol? | The orange monolayer will face the cytosol. |
| Animals exploit the phospholipid asymmetry of their plasma membrane to distinguish between live cells and dead ones... How might a cell actively engineer this phospholipid redistribution? | by activating a scramblase and inactivating a flippase in the plasma membrane |
| All of the carbohydrates in the plasma membrane face the cell exterior. Which direction do the carbohydrates on internal cell membranes face? | the lumen of the vesicle or organelle |
| Shown is a schematic diagram of a membrane phospholipid. Which segment will always carry a negative charge? | B (middle segment) |
| Which is true of the molecule shown below? | It is a lipid. It makes the bilayer less fluid. It is amphipathic. |
| Which membrane would show a more rapid recovery of fluorescence in a FRAP study? | a membrane containing a larger proportion of unsaturated fatty acids |
| In 1925, scientists exploring how lipids are arranged within cell membranes... Which of the following would have allowed the scientists to come to this conclusion? | The extracted lipids covered twice the surface area of the intact red blood cells. |
Created by:
pwalsh
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