If beetroot pieces were placed in a test tube filled with water, and this test tube was placed inside hot water which then made the shade of the water darken, what evidence is there to prove that the living membrane is selectively permeable?

If beetroot pieces were placed in a test tube filled with water, and this test tube was placed inside hot water which then made the shade of the water darken, what evidence is there to prove that the living membrane is selectively permeable?

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter4: Organization Of The Cell

Section4.1: The Cell: Basic Unit Of Life

Problem 5C: Why is the relationship between surface area and volume of a cell important in determining cell size...

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Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

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