The Structure and Transport of Materials across - Cell Membranes.
Cell Membranes & Transport Page 1 -...
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Cell Membranes & Transport Page 1 When the concentration of solutes differs on the two sides of a membrane permeable only to water 1 A water will move across the membrane by osmosis B water will move across the membrane by active transport C water will move across the membrane by plasmolysis D solutes will move across the membrane from hyper- to hypotonic regions Movement of solutes across a plasma membrane from a region of higher solute concentration to lower with the aid of proteins 2 A active transport B bulk flow C osmosis D facilitated diffusion Movement of water across a membrane from a region of higher concentration of water to a region of low through aquoporins 3 A active transport B bulk flow C osmosis D facilitated diffusion Movement of water out of a cell resulting in the collapse of the plasma membrane surrounding the central vacuole. 4 A bulk flow B osmosis C facilitated diffusion D plasmolysis Movement of solutes across a plasma membrane requiring addition of energy 5 A bulk flow B facilitated diffusion C active transport D plasmolysis The movement of molecules during diffusion can be described by all of the following EXCEPT 6 A molecular movements are random B net movement of solute molecules is from a region of higher to lower concentration C each molecule moves independently of other molecules D solute molecules always move down the concentration gradient 12/4/2013 1:11:33 PM
Transcript of Cell Membranes & Transport Page 1 -...
Cell Membranes & Transport Page 1
When the concentration of solutes differs on the two sides of a membrane permeable onlyto water
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A water will move across the membrane by osmosisB water will move across the membrane by active transportC water will move across the membrane by plasmolysisD solutes will move across the membrane from hyper- to hypotonic regions
Movement of solutes across a plasma membrane from a region of higher soluteconcentration to lower with the aid of proteins
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A active transportB bulk flowC osmosisD facilitated diffusion
Movement of water across a membrane from a region of higher concentration of water to aregion of low through aquoporins
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A active transportB bulk flowC osmosisD facilitated diffusion
Movement of water out of a cell resulting in the collapse of the plasma membranesurrounding the central vacuole.
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A bulk flowB osmosisC facilitated diffusionD plasmolysis
Movement of solutes across a plasma membrane requiring addition of energy5
A bulk flowB facilitated diffusionC active transportD plasmolysis
The movement of molecules during diffusion can be described by all of the followingEXCEPT
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A molecular movements are randomB net movement of solute molecules is from a region of higher to lower
concentrationC each molecule moves independently of other moleculesD solute molecules always move down the concentration gradient
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Which of the following statements is true?7
A the water level in the tube will rise to a level above he water in the beakerB the water level in the tube will drop to a level below the beakerC there will be no change in the water level of the tube & the water will
remain pureD there will be no change in the water level of the tube, but sucrose will mix in
Which cell best eliminates wastes & obtains nutrients Why?Cell Surface Area Volume A 150 125 B 100 50 C 6 1 D 200 200
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A Cell A due to a high surface areaB Cell B due to moderate surface area & volumeC Cell C due to high surface area to volume ratioD Cell D due to identical surface area & volume
Which of the following cells will be able to eliminate wastes and obtain nutrients moreefficiently & why?
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A Cell A due to its high surface areaB Cell B due to its moderate surface area & volumeC Cell C due to its high surface area to volume ratioD Cell D due to its identical surface area & volume
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Which of the following accurately describes what will take place next If the semi-permeablemembrane separating the two sides of the tube allows passage of glucose and water only?
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A sucrose will diffuse from side B to AB glucose will diffuse from side A to BC Glucose will diffuse from side B to AD There will be a net movement of water from side B to A
Large molecules are moved out of the cell by which of the following processes?11
A pinocytosisB phagocytosisC exocytosisD receptor-mediated endocytosis
Which process includes all the others?12
A osmosisB diffusion of a solute across a membraneC facilitated diffusionD passive transport
A membrane permeable to glucose & fructose, but not sucrose is immersed in a beakercontaining a different solution than what is inside the membrane. Which solute(s) willexhibit a net diffusion into the cell?
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A fructoseB sucroseC glucoseD both fructose and glucose
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The membrane is permeable to glucose & fructose, but not sucrose. Which solute(s) willexhibit a net diffusion out of the dialysis tubing into the beaker?
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A waterB sucroseC fructoseD glucose
Which solution is hypertonic to the other15
A dialysis tubing for sucrose onlyB dialysis tubing for glucose onlyC beaker solution for fructose onlyD beaker solution for sucrose & glucose
Which is most likely to occur16
A osmosis will occur from the beaker to the bagB the bag will gain mass due to osmosisC water will diffuse out of the dialysis bag by osmosisD the mass of both the beaker & bag will increase slightly
If a cell dies, but its membrane is still intact, which of the following will cease to occur?17
A diffusionB passive supportC active transportD osmosis
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Answer Key :
Question: Answer
Cell Membranes & Transport
A1D2C3D4C5D6B7C8C9C10C11D12A13D14C15C16C17
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