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- 1. Multiple Choice
The fluid mosaic model proposes that plasma membranes consist of:
a protein bilayer with phospholipids interspersed between the protein molecules
two layers of lipid with protein between them
two layers of protein with lipid between them
a phospholipid bilayer with protein molecules interspersed between the phospholipid molecules
- 2. Multiple Choice
Proteins in the plasma membrane may be involved in:
transport of ions in and out of cells through ion pores
cell recognition
Receptors
all of the above
- 3. Multiple Choice
Proteins in the plasma membrane may be involved in:
transport of ions in and out of cells through ion pores
cell recognition
Receptors
all of the above
- 4. Multiple Choice
Ions cannot pass across a plasma membrane by simple diffusion because the particles are:
too large
non-polar
hydrophobic
charged
- 5. Multiple Choice
Facilitated diffusion always involves:
movement of ions
movement against a concentration gradient
ATP
transport proteins
- 6. Multiple Choice
As the concentration gradient is increased:
the rate of both simple diffusion and facilitated diffusion will increase continually
the rate of simple diffusion will rise and then level off but the level of facilitated diffusion will increase
continually
the rate of simple diffusion will increase continually but the rate of facilitated diffusion will rise and
then level off
the rate of both simple diffusion and facilitated diffusion will rise and then level off
- 7. Multiple ChoiceWhat is Osmosis?equal concentrationdiffusion of water through a selectively-permeable membranehigh to low concentrationnon-polar tail
- 8. Multiple ChoiceWhich is true about active transport?It requires energyit does not require energyIt moves substances down the concentration gradientit moves material from high to low concentration
- 9. Multiple ChoicePassive transport requires noconcentration gradientsosmosismotionenergy
- 10. Multiple ChoiceWhich of the following substances passes through the plasma membrane through the process of osmosis?glucosewaterproteinsodium
- 11. Multiple ChoiceThe movement of atoms, ions, or molecules from an area of high concentration to an area of low concentration.osmosisactive transportdiffusionhypertonic
- 12. Multiple ChoiceA person would never have pure water put into their veins in a hospital because their cells would...Shrink/DehydrateExpand
- 13. Multiple ChoiceWhich process uses proteins to move molecules against a concentration gradient?active transportendocytosispassive transportphagocytosis
- 14. Multiple Choice
Which form of active transport is being shown? (Inside of the cell is tan colored)Facilitated DiffusionExocytosisEndocytosisReceptor-mediated endocytosis - 15. Multiple ChoiceWhich is NOT a form of active transport?EndocytosisOsmosisExocytosisPinocytosis
- 16. Multiple ChoiceWhen cells form a vesicle to release materials, which form of transport is occurring?EndocytosisExocytosisFacilitated DiffusionOsmosis
- 17. Multiple ChoiceThe sodium-potassium pumps requires energy to move ions across the cell membrane against their concentration gradient so it is a type ofactive transportosmosisdiffusionfacilitated diffusion
- 18. Multiple ChoiceWhen looking at the cell membrane, where are the lipid tails located?Inner part of the bilayerOuter part of the bilayerAt the end of the bilayerGoes through each end of the bilayer
- 19. Multiple ChoiceDuring osmosiswater moves from high to low concentrationlarge or oddly shaped molecules move across a cell membranewater moves when energy is usedproteins are built
- 20. Multiple ChoicePermeable meansthings can pass throughthe concentration levels are differentit is permanentthings are stuck
- 21. Multiple ChoiceWhen both inside and outside of a cell have the same amount of water it is said that the cell has reached a state ofOsmosisDiffusionEquilibrium
- 22. Multiple Choice
If there is 5 percent water inside a cell and 5 percent water outside a cell
Water will move INTO the cell
Water will move OUT OF the cell
There will be NO movement of water
There will be NO NET movement of water into or out of the cell
- 23. Multiple Choice
What feature of a root hair cell makes it good at osmosis?
It is green
It has a large surface area
It contains a lot of chloroplasts
It contains a lot of mitochondria
- 24. Multiple ChoiceIn biological membranes, the phospholipids are arranged in a _______, with the_______.bilayer; fatty acids pointing toward each otherbilayer; fatty acids facing outwardsingle layer; fatty acids facing the interior of the cellsingle layer; phosphorus-containing region facing the interior of the cell
- 25. Multiple ChoiceIf aquaporins are injected into the membranes of epithelial cells that line blood vessels,the flow of Na+ through aquaporins will increasethe intracellular concentration of K+ will increasethe membranes will become more permeable to waterthe electrical properties of the cells will be altered
- 26. Multiple Choice
A in the image
simple diffusion
facilitated diffusion via channel protein
facilitated diffusion via transport protein
primary active transport
secondary active transport
- 27. Multiple ChoiceA white blood cell engulfing a bacteria is an example of:endocytosisexocytosiscotransportfacilitated diffusion
- 28. Multiple ChoiceWhat is it called when molecules move across the cell membrane from an area of high concentration to an area of low concentration through a carrier protein?DiffusionOsmosisActive TransportFacilitated Diffusion
- 29. Multiple Choice
Identify what part of the cell membrane that is represented by letter A.
Phospholipid Bilayer
Integral Protein
Cholesterol
Carbohydrate Chain
- 30. Multiple Choice
Which image correctly shows the way phospholipids arrange themselves in the cell (plasma) membrane?
- 31. Multiple Choice
A
B
C
D
- 32. Multiple Choice
A
B
C
D
- 33. Multiple Choice
A
B
C
D
- Answer choicesTagsAnswer choicesTags