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- 1. Multiple ChoiceSubstance X is moving into a cell from an area of low concentration. Which of the following is responsible for transporting substance X into the cell?Proteins through the process of active transportPhospholipids through the process of active transportProteins through the process of passive transportPhospholipids through the process of passive transport
- 2. Multiple Choice
In the picture to the right, which area(s) represent(s) the hydrophobic part of the phospholipid membrane?Structure AStructure BStructures A & BNeither structure A or B - 3. Multiple ChoiceA cell with a semi-permeable membrane is placed in an aqueous solution with one type of particle. The cell contains 80% water. how much salt is located inside of the cell?60%80%20%40%
- 4. Multiple ChoiceDescribe the movement of "Molecule D" in the apparatus shown to the right over time.They will stay in the same placeThey will move across the they are membrane until they are all on side BThey will move across the membrane until they reach an equilibrium."Molecule D" will move to side A, but "Molecule C" will stay in the same place.
- 5. Multiple ChoiceA red blood cell has lost water due to certain changes inside the body. What causes the water to leave the red blood cell?The fluid outside the cell is more concentrated with water, causing the red blood cell to shrink.The fluid outside the cell is less concentrated with water, causing the red blood cell to swell.The fluid outside the cell is less concentrated with water, causing the red blood cell to shrink.The fluid outside the cell is more concentrated with water, causing the red blood cell to swell.
- 6. Multiple ChoiceOn the diagram below, indicating the direction of osmosis (water)Into the cellOutside the cellRemain the same inside and outside the cellRemain the same outside, but not inside
- 7. Multiple ChoiceMolecule X moves across a cell membrane by active transport. Which statement best indicates the relationship that represents diffusion?HIgh conc >low
Uses ATPHigh Conc > Low
Does not use ATPLow Conc > High
Uses ATPLow Conc > High
Does not use ATP - 8. Multiple ChoiceEggs were soaked in water and corn syrup, weighed the eggs before and after osmosis occurred.
For Cup A that contained water, before osmosis it weighed 5.5 grams. After the movement of water occurred, Cup A then measured to be 6.5 grams.
Cup B was filled with corn syrup and weighed 5.5 grams before osmosis occurred. After osmosis occurred, it weighed 3.3 grams.
What is the independent variable?The size of the eggThe direction of osmosisThe concentration gradients of liquidsThe type of container - 9. Multiple ChoiceThe protein moves small molecules and ions across the cell membrane.
For example, ions are moves from the side where there are few ions to the side where there are more ions.
Which best describes this process of moving ions against a concentration difference?Facilitated diffusion not requiring energyActive transport requiring energyPassive transportOsmosis - 10. Multiple ChoiceOsmosis occurs when there is a different concentration of solute molecules on each side of the membrane. There is a beaker containing a 30% salt solution with a plastic bag containing a 10% salt solution. What will happen to the bag after about twenty minutes?Salt will move from the bag into the 30% salt solution.Salt will move from the 30% salt solution into the bag.Water will move from the 30% salt solution into the bag.Water will move from the bag into the 30% salt solution.
- 11. Multiple ChoiceGlucose is not able to pass through a semi-permeable cell membrane. If the cells need sugar to make ATP and carry out cellular processes, how does the sugar get into the cell?passive transport by diffusionactive transport using ATP and carrier proteinspassive transport by osmosisphagocytosis
- 12. Multiple ChoiceA person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?The swollen gums have absorbed the saltwater solution.The saltwater solution lowers the temperature of the water in the gums.The salt in the solution has moved against the concentration gradient.The water in the gums has moved out due to the high concentration of salt in the solution.
- 13. Multiple ChoiceCells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell membrane against the concentration gradient. How do these molecules get into the cell?passive transport by diffusionactive transport using ATPPassive transport by OsmosisPhagocytosis
- 14. Multiple ChoiceThe cell membrane of the red blood cell will allow water, oxygen, and carbon dioxide to pass through. Because other substances are blocked from entering, this membrane is calledPerforatedSemi-permeableNon-conductivePermeable
- 15. Multiple ChoiceLow density lipoproteins (LDL’s or bad cholesterol) are taken up “in-bulk” into the cytoplasm of a cell. This process is an example ofendocytosis.exocytosismolecular transportosmosis.
- 16. Multiple ChoiceDiffusion does not require the cell to expend ATP. Therefore, diffusion is considered a type ofendocytosisexocytosisactive transportpassive transport
- 17. Multiple ChoiceWhich of the following is a true statement about diffusion? Diffusionoccurs from a high to low concentrationoccurs from low to high concentrationoccurs from low to low concentrationoccurs from high to high concentration
- 18. Multiple ChoiceSince cholesterol is a lipid, it diffuses easily into (or out of) cells because it interacts with the nonpolar regions of phospholipids.TrueFalse
- 19. Multiple ChoiceExamine the diagram below. The process illustrated by the neurotransmitter leaving the sending neuron is calledendocytosisexocytosispassive transportactive transport
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