<p>A single-celled protist (animal cell), composed of 97% water, has <br />been

Question

<p>A single-celled protist (animal cell), composed of 97% water, has <br />been placed in a 1% sugar solution. <br />1. At the time when the protist was placed in the solution, <br /> a) what can you say about the concentration of solutes within the <br /> animal cell? <br /> b) what was the tonicity of the sugar solution? <br />2. In which direction (if any) would there be net movement over time? <br />3. After an extended time, would you expect to see a change in the <br /> appearance of this protist? Explain.</p>

Explanation / Answer

1-A) The concentration in the solutes is lower, because the water potential is higher than the water potential in the sugar solution. B)tonicity is influenced only by solutes that cannot cross the membrane, as only these exert an osmotic pressure. 2-A) the direction is down the concentration gradient 3-the water molecules will move from refion with high water potential to region with lower water potential, so the water from the prostist will go out and the cell will shrink.

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