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- 1. Multiple ChoicePrincipal classes of membrane proteins include all of the following exceptreceptorscell surface markerstransport proteinsspectrins
- 2. Multiple ChoiceWhich of the following are not components of the cell membrane?cell surface markerstransmembrance proteinsplasmodesmatainterior protein network
- 3. Multiple ChoiceTo cross the cell membrane, water mustsqueeze between phospholipid moleculespass through aquaporinsbe transported at the expense of ATPbe moved by a cotransport system
- 4. Multiple ChoiceIf a cell's contents are greatly hypoosmotic to the surrounding environment, the cell will probablyexpandbecome isotonicburstshrivel
- 5. Multiple ChoiceThe sodium-potassium pump passesmore Na+ out than K+ inK+ out and Na+ in on a one-for-one basisNa+ out and K+ in on a one-for-one basisK+ and Na+ in the same direction
- 6. Multiple ChoiceExocytosis is a process by which cellspass substances out of the cell through the membrane by osmosisrelease substances directly into the extracellular fluid through a porepass substances out of the cell in vesicles
- 7. Multiple ChoiceA phospholipid hasa phosphate group in place of one fatty acidphosphate groups in place of two fatty acids
- 8. Multiple ChoiceClathrin-coated pits are used toextrude bulk fluids from the cellallow desired molecules directly into the cytoplasmpass information into adjacent cellsbring desired substances from the environment into the cell in vesicles
- 9. Multiple ChoiceA lipid bilayerpermits water soluble molecules to pass through itfacilitates the passage of water soluble molecules through itinhibits the passage of water soluble substances through itactively transports water soluble molecules through it
- 10. Multiple ChoiceA cell is recognized by other tissue members as "self" by its surfaceglycolipidsphosphate groupsglycoproteinsglycocarbohydrates
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