Post-test on CH.5 - Post-Test on Chapter 5 This activity...

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Post-Test on Chapter 5 This activity contains 47 questions. Phospholipids are well suited to be the main structural components of membranes because they _____. ( Module 5.1 ) are completely insoluble in water form a single sheet in water form a structure in which the hydrophobic portion faces outward form a selectively permeable structure are triglycerides, which are commonly available in fatty foods The lipids in a cell membrane are arranged _____. ( Module 5.1 ) between two layers of protein on either side of a single layer of protein so that the polar parts of two lipids point toward each other so that the nonpolar parts of two lipids point toward each other so that the hydrophilic components are arranged to face each other Phospholipids are well suited to serve as the major component of the plasma membrane because they _____. ( Module 5.1 ) have a water-soluble part and a water-insoluble part have very diverse structures and can act as receptors, enzymes, and channel molecules allow all needed molecules to pass through the membrane while being impermeable to any toxic substances contain protein are rigid structures
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Which of the following best describes the general structure of a cell membrane? ( Module 5.1 ) proteins sandwiched between two layers of phospholipid proteins embedded in two layers of phospholipid a layer of protein coating a layer of phospholipid phospholipids sandwiched between two layers of protein phospholipids embedded in two layers of protein The membrane is referred to as a "fluid mosaic" structure. Which of the following statements is true? ( Module 5.1 ) The fluid is phospholipid, and the mosaic is carbohydrate. The fluid is protein, and the mosaic is phospholipid. The mosaic comprises the carbohydrate chains on the inner surface of the membrane. The fluid is phospholipid, and the mosaic is protein. The term refers to the appearance of cells in a tissue. Stability of an animal cell plasma membrane is enhanced by _____. ( Module 5.1 ) cholesterol molecules saturated triglycerides saturated phospholipids polyunsaturated triglycerides hydrogenation of the component lipids
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As shown below, proteins perform a number of functions within membranes. Which of the following statements is true about membrane proteins? ( Module 5.1 ) Proteins keep the membrane fluid. Proteins form the basis of the semipermeable membrane. Proteins can bind other molecules, which may trigger specific cellular functions. Proteins allow for the transportation of small, nonpolar, hydrophobic molecules. Proteins facilitate membrane stabilization. When considering the formation of membranes, they _____. ( Module 5.2 ) are formed under the direction of the cell's DNA form spontaneously in aqueous environments require enzymes to form into bilayer structures are constructed using specialized scaffolding proteins are formed under the direction of the nucleus
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In the figure below, working from the inside out, what would be the order of components observed? ( Module 5.2
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This note was uploaded on 01/17/2011 for the course POLITICAL 210 taught by Professor Amitage during the Spring '08 term at San Mateo Colleges.

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Post-test on CH.5 - Post-Test on Chapter 5 This activity...

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