D) E 9) Which component is a glycolipid? /A) A B) B c) C D) E 10) What kinds of
ID: 203617 • Letter: D
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D) E 9) Which component is a glycolipid? /A) A B) B c) C D) E 10) What kinds of molecules pass through a cell membrane most easily? A) large and hydrophobic B) small and hydrophobic C) large polar D) ionic 11) Which of the following processes includes all others? A) osmosis B) facilitated diffusion C) passive transport D) transport of an ion down its electrochemical gradient 12) What will happen to a red blood cell (RBC), which has an internal ion concentration of about 0.9 percent, if it i placed into a beaker of pure water? A) The cell would shrink because the water in the beaker is hypotonic relative to the cytoplasm of the RBC. B) The cell would shrink because the water in the beaker is hypertonic relative to the cytoplasm of the RBC. C) The cell would swell because the water in the beaker is hypotonic relative to the cytoplasm of the RBC D) The cell will remain the same size because the solution outside the cell is isotonic. 13) A sodium-potassium pump A) moves three potassium ions out of a cell and two sodium ions into a cell while producing an ATP for each B) move three sodium ions out of a cell and two potassium ions into a cell while consuming an ATP for each C) moves three potassium ions out of a cell and two sodium ions into a cell while consuming 2 ATP in each D) move three sodium ions out of a cell and two potassium ions into a cell and generates an ATP in each cy Copyright © 2014 Pearson Education, Inc.Explanation / Answer
10) Small and hydrophobic - Small and hydrophobic (non-polar) molecules such as oxygen can pass through a cell membrane without any hindrance. But large molecules or ions cannot pass through a membrane without the help of a carrier or a channel.
11) Facilitated diffusion - Facilitated diffusion is a passive-mediated transport, by which small molecules pass through a semi permeable membrane. Similarly osmosis is for water molecule. Through facilitated diffusion, ions are transported down a electrochemical gradient.
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