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Download Osmosis and Tonicity Worksheet Answer Key and more Exercises Cell Biology in PDF only on Docsity!
Name: iC & a - Period: v ‘ Worksheet - Osmosis & Tonicity READ ME! In each diagram below, a “celi” with a semipermeable membrane has been placed in a beaker containing substances that are dissolved in water. The membrane is permeable to water & iodine. It is not permeable to glucose, sodium (Na’), or starch. Please remember that iodine (Lugol's solution) is an indicator for starch! Therefore, it will tum from yellow-brown to blue-black in the presence of starch, If not otherwise indicated, you may assume for each problem that the remjnder of the solution is water. Beaker 1 90% glacose 20% glucose A. What is the % of water inside the cell? B. What is the % of water outside the cell? C. Wilt osmosis occur? s D. Ifso, in what direction will osmosis occur? out E. Will glucose diffuse? “2 F. Will the cell shrink or sweil?_Shein k G. How do you know? wader bS movil su + H. This diagram shows the cell in a(n) (circle one) hypotonic {hypertor cy isotonic solution. Beaker 2 A. What is the % of water inside the cell?_ FOZ B. What is the % of water outside the cell? __£* Oe C. Will osmosis occur? iat S a : D. If so, in what direction will osmosis occur? ivy E. Will glucose diffuse? * F. Will the cell shrink or swell? G. How do you know? _! : ef H. This diagram shows the cell in a(n) (circle one} hypotonic, hypertonic / isotonic solution. Beaker 3 A. What is the % of water inside the cell? What is the % of water outside the cell? 56" Will there be a mez change in these concentrations? Will osmosis occur? #i@ Why? % ast her FS agit At. Will starch diffuse? 1 Will glucose diffuse? 1 ¢ If iodine were placed in the beaker, what would you see immediately? iiue coler mao w G. What would you see after several hours? Why? Sarena Per 60% glucose, 10% sta: 60% starch ich H. This diagram shows the cell in a(n) (circle one) hypotonic / hypertonic /isotoni¢'solution. 
