chapter 7 and 11 quizzes

chapter 7 and 11 quizzes - 1 Chapter 7: Membrane Structure...

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Chapter 7: Membrane Structure and Function Chapter Quiz 2 . The plasma membrane is referred to as a "fluid mosaic" structure. Which of the following statements is true? =The fluid component of the membrane is phospholipid, and the mosaic is protein. 4 . Consider the currently accepted fluid mosaic model of the plasma membrane. Where in the plasma membrane would cholesterol most likely be found? =in the interior of the membrane 5 . Which of the following functional processes result(s) from the presence of proteins in or on the plasma membrane? enzymatic activity/cell-cell recognition/intercellular joining/cell-cell communication >>all of the above 7 . Select the correct statement concerning carbohydrates associated with the plasma membrane. =Membrane carbohydrates function primarily in cell-cell recognition. 8 . Consider the currently accepted fluid mosaic model of the plasma membrane. Where in the membrane would oligosaccharides most likely be found? =on the outside (external) surface of the membrane 9 . Which statement(s) about the sidedness of the plasma membrane is (are) correct? Parts of proteins that are exposed on the cytoplasmic side of the endoplasmic reticulum are also exposed on the cytoplasmic side of the plasma membrane. The asymmetrical distribution of membrane proteins, lipids, and carbohydrates across the plasma membrane is determined as the membrane is being constructed. Every integral membrane protein has specific orientation in the plasma membrane. >>>The first, second, and third answers are all correct. 10 . Which one of the following molecules is most likely to diffuse freely across the lipid bilayer of the plasma membrane without the involvement of a transport protein?. ........... =carbon dioxide 11 . Which of the following would be least likely to diffuse through a plasma membrane without the help of a transport protein? …………………=a large polar molecule 13 . Which of the following statements is true about passive transport? =Passive transport permits the transported molecule to move in either direction, but the majority of transport occurs down the concentration gradient of the molecule. 14 . Cells A and B are the same size, shape, and temperature, but cell A is metabolically quiet and cell B is actively consuming oxygen. Oxygen will diffuse more quickly into cell _____ because _____. =B . .. the diffusion gradient in cell B is steeper 15 . Which one of the following statements is true about diffusion? ……………….=It is a passive process. 16 . The internal solute concentration of a plant cell is about 0.8 M. To demonstrate plasmolysis, it would be necessary to suspend the cell in what solution?. ........................ =1.0 M 17 . A single plant cell is placed in an isotonic solution. Salt is then added to the solution. Which of the following would occur as a result of the salt addition? (Concept 7.3E-Book) [Hint]
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chapter 7 and 11 quizzes - 1 Chapter 7: Membrane Structure...

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