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Chapter 05 - Membranes

Chapter 05 Membranes

Blooms Level: 1. Remember LO: 05.02.03 Describe the factors involved in membrane fluidity. Section: 05.02 Phospholipids: The Membranes Foundation Topic: Cell Structure

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Chapter 05 - Membranes

3. A. B. C. D.

What is the net movement of substances to regions of lower concentration called? Osmosis Active transport Facilitation Diffusion

B. cytoskeletal C. structural D. targeted

Blooms Level: 1. Remember LO: 05.05.01 Differentiate between active transport and diffusion. Section: 05.05 Active Transport Across Membranes Topic: Cell Structure

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Chapter 05 - Membranes

6. Osmosis occurs as water can cross the lipid bilayer through specialized channels for water movement called ________________. A. proteins B. transmembrane carbohydrates C. membrane pores D. aquaporins

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Chapter 05 - Membranes

8. Membrane proteins are not very soluble in water, because they possess long stretches of non-polar amino acids that are A. too long to interact with the water molecules. B. hydrophobic. C. are transmembranal. D. hydrophilic. E. used as transport channels.

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Chapter 05 - Membranes

10. A type of transport of a solute across a membrane, up its concentration gradient, using protein carriers driven by the expenditure of chemical energy is known as A. osmosis. B. diffusion. C. facilitated transport. D. active transport. E. exocytosis.

Section: 05.03 Proteins: Multifunctional Components Topic: Cell Structure

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Chapter 05 - Membranes

Multiple Choice Questions

12. How are the tails and heads of membrane phospholipids oriented in their environment? A. The hydrophobic heads are oriented towards each other and the hydrophillic tails are

Blooms Level: 2. Understand LO: 05.02.03 Describe the factors involved in membrane fluidity. Section: 05.02 Phospholipids: The Membranes Foundation Topic: Cell Structure

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Chapter 05 - Membranes

14. On the outer surface of the plasma membrane there are marker molecules that identify the cell type. Often these molecules are A. ATP. B. amino acids. C. nucleotides. D. carbohydrate chains. E. inorganic ions.

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Chapter 05 - Membranes

16. The part of a membrane protein that extends through the phospholipid bilayer is primarily composed of amino acids that are A. highly polar. B. negatively charged. C. non-polar. D. positively charged. E. water soluble.

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Chapter 05 - Membranes

18. The movement of substances to regions of lower concentration is called A. active transport. B. diffusion. C. pinocytosis. D. pumping. E. exocytosis.

A. B. C. D.

plasma membranes. organelles. cytoskeletons. cell walls.

Blooms Level: 1. Remember LO: 05.04.03 Predict the direction of water movement by osmosis. Section: 05.04 Passive Transport Across Membranes Topic: Cell Structure 5-9 © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part

Chapter 05 - Membranes

21. The actual transport of protons by the proton pump is mediated by a transmembrane protein which undergoes a change in its A. conformation. B. amino acid sequence. C. net charge. D. solubility. E. immunity.

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Chapter 05 - Membranes

23. Carrier-mediated transport is also called A. facilitated diffusion. B. active transport. C. exocytosis. D. endocytosis. E. phagocytosis.

B. C. D. E.

active transport. osmosis. diffusion. endocytosis.

Blooms Level: 2. Understand LO: 05.06.01 Distinguish between endocytosis and exocytosis. Section: 05.06 Bulk Transport by Endocytosis and Exocytosis Topic: Cell Structure 5-11 © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part

Chapter 05 - Membranes

26. The type of movement of molecules that is specific and passive, and which becomes saturated if all of the protein carriers are in use is A. exocytosis. B. facilitated diffusion. C. active transport. D. endocytosis. E. osmosis.

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Chapter 05 - Membranes

28. In a single sodium-potassium pump cycle, ATP is used with the result that A. 3 sodium ions leave and 2 potassium ions enter. B. 2 sodium ion enters and 1 potassium ion leaves. C. 2 sodium ion leaves and 1 potassium ion enters. D. 3 sodium ions enter and 2 potassium ions leave. E. sodium and potassium ions enter and water leaves.

B. C. D. E.

serve as an energy molecule. maintain fluidity. mediate steroid action. maintain hypertension.

Blooms Level: 1. Remember LO: 05.02.03 Describe the factors involved in membrane fluidity. Section: 05.02 Phospholipids: The Membranes Foundation Topic: Cell Structure 5-13 © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part

Chapter 05 - Membranes

31. A phospholipid molecule has a polar and a nonpolar end. Because of this, water molecules form A. polar bonds with the nonpolar end of the phospholipid molecule. B. polar bonds with the polar end of the phospholipid molecule. C. hydrogen bonds with the nonpolar end of the phospholipid molecule. D. hydrogen bonds with the polar end of the phospholipid molecule. E. covalent bonds with the nonpolar end of the phospholipid molecule.

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Chapter 05 - Membranes

33. Membrane proteins serve many functions. One of the functions is transportation of substances across the membrane. If a cell biologist placed cells into an environment in which a chemical has been added that blocks the function of only carrier proteins, the process that will be affected is A. active transport. B. osmosis. C. simple diffusion.

LO: 05.04.01 Compare simple diffusion and facilitated diffusion. Section: 05.04 Passive Transport Across Membranes Topic: Cell Structure

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Chapter 05 - Membranes

35. Facilitated diffusion is an important method for cells in obtaining necessary molecules and removing other ones. Requirements for facilitated diffusion include A. The carrier molecule must be specific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. B. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. C. The carrier molecule is nonspecific to the molecule that is transported. The direction of

Topic: Cell Structure

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Chapter 05 - Membranes

37. One day during the summer you and some friends make ice cream using an electric ice cream maker. A few days later you notice a yellow circle of dead grass where the ice cream freezer had been placed. What happened? A. The ice and salt mixture that spilled out when the freezer was moved froze the grass. B. The ice and salt mixture was isosmotic to the grass cells and caused the yellow circle of dead grass. C. The ice and salt mixture was hyperosmotic to the grass cells and caused the yellow circle

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Chapter 05 - Membranes

39. A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass. They inject a 5M solution of glucose into the cell and then place the cell into a beaker of water. After an hour, what effect do you expect to observe? A. Water moves out of the cell B. Glucose moves out of the cell C. No net change in cell weight

Section: 05.04 Passive Transport Across Membranes Topic: Cell Structure

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Chapter 05 - Membranes

41. Turgor pressure is observed when a plant cells environment is ________________. A. hypoosmotic B. isosmotic C. osmosis D. hyperosmotic

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Chapter 05 - Membranes

43. Cyclodextrins are a group of compounds capable of removing cholesterol from membranes. The effect most likely to have a large impact on cells as a result of cyclodextrin treatment would be A. increased concentration of transmembrane proteins. B. increased permeability of the membrane. C. increased membrane fluidity at lower temperatures. D. increased membrane fluidity at higher temperatures.

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Chapter 05 - Membranes

45. GABAA receptors play an essential role in neurotransmission in the central nervous system. In response to the appropriate signal, these receptors open up and allow Cl- to flow into the cell. Given this information, GABAA receptors can be classified as a A. gated ion channel. B. gated carrier protein. C. symporter. D. Cl- pump.

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Chapter 05 - Membranes

47. Incubation of cells at 20C blocks the release of proteins from the trans-Golgi. Under such conditions, you would expect to see A. an increase in exocytosis. B. a decrease in exocytosis. C. an increase in endocytosis. D. a decrease in endocytosis.

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Chapter 05 - Membranes

49. If a cell has a normal osmotic pressure of 4500 mmHg and is placed into a solution with an osmotic pressure of 3500 mmHg, what will happen to the cell? A. The cell will lose water and its osmotic pressure will decrease. B. The cell will gain water and its osmotic pressure will decrease. C.

Blooms Level: 3. Apply LO: 05.05.01 Differentiate between active transport and diffusion. Section: 05.05 Active Transport Across Membranes Topic: Cell Structure

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Chapter 05 - Membranes

Check All That Apply Questions

51. Receptor-mediated endocytosis brings in specific material by engulfing it in vesicles. What factors directly or indirectly affect this process? Choose all that apply. _____ It is a passive process

Blooms Level: 4. Analyze LO: 05.03.02 Illustrate how proteins can associate with the membrane. Section: 05.03 Proteins: Multifunctional Components Topic: Cell Structure

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Chapter 05 - Membranes

53. During neuronal signaling, a change in membrane potential will cause sodium channels to open and let Na+ ions diffuse down their concentration gradient into the cell. Which of the following helps establish the concentration gradient necessary for this process to occur? A. Na+/K+ channel B. voltage-gated Na+ channel C. Na+ symporter D. Na+/K+ pump

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Chapter 05 - Membranes

55. If you were a very thirsty cell, which process would you use to take in some nutrients secreted by one of your neighbors? A. Phagocytosis B. Pinocytosis C. Receptor-mediated endocytosis D. Exocytosis

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Chapter 05 - Membranes

57. Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue. It typically happens when an area of the body is injured or damaged, and an inflammation response is required. What role would you expect cell adhesion molecules to play in this process? A. Cell adhesion molecules will allow the white blood cells to cling to one another to form a migrating clot. B. Cell adhesion molecules help white blood cells adhere to the blood vessel wall so that they

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Chapter 05 - Membranes

Check All That Apply Questions

59. A concentration gradient is exhibited (when): Choose all that apply. _____ the room temperature is 34 degree Celsius and the outside air is 34 degrees Celsius __X__ intracellular fluid has 5% solute and extracellular fluid has 0.8% solute concentration

Blooms Level: 3. Apply LO: 05.04.01 Compare simple diffusion and facilitated diffusion. Section: 05.04 Passive Transport Across Membranes Topic: Cell Structure

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Chapter 05 - Membranes

61. When the solute concentration of solution A is lower than the solute concentration of solution B, solution A is considered A. hypertonic. B. hypotonic. C. isotonic.

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Chapter 05 - Membranes

Multiple Choice Questions

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