Answered: plasma membrane?

Science

Biology

plasma membrane?

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 10RQ: Which plasma membrane component can be either found on its surface or embedded in the membrane...

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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.

Question

Can you list two different ways in which nucleotides can carry energy and draw a diagram of the cross-section of a typical plasma membrane?

Definition Definition A complex molecule that makes up a fundamental unit of a DNA or RNA molecule. Nucleotides are composed of a sugar, a nitrogenous base, and a phosphoric acid.

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