Day19_cells&membranes Quiz

Day19_cells&membranes Quiz - Question 1 of 18

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Question 1 of 18 0.5/ 0.5 Points For animations to help you visualize the concepts in this quiz, go to  http://www.biologycorner.com/bio1/diffusion.html# Question 1: Simple diffusion is defined as the  movement of A. molecules from areas of higher concentration to areas of lower concentration. B. molecules from areas of lower concentration to areas of higher concentration. C. water molecules across a membrane. D. gas molecules across a membrane. E. gas or water molecules across a membrane. Answer Key: A Question 2 of 18 0.5/ 0.5 Points Diffusion is one of the processes whereby materials are exchanged between a cell and its environment. A. true B. false Answer Key: A Question 3 of 18 0.5/ 0.5 Points The molecules in a solid lump of sugar do not move. A. true B. false Answer Key: B Question 4 of 18 0.5/ 0.5 Points When sugar is mixed with water, equilibrium is reached when
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A. molecules of sugar stop moving. B. water and sugar molecules are moving at the same speed. C. the dissolved sugar molecules are evenly distributed throughout the solution.
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Day19_cells&membranes Quiz - Question 1 of 18

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