Cholesterol maintains the fluidity and stability of membranes at different temperatures. Cholesterol, therefore, ensures that the lipid bilayer Is always packed firmly Always has sugar molecules Is always moving Is destroyed

Cholesterol maintains the fluidity and stability of membranes at different temperatures. Cholesterol, therefore, ensures that the lipid bilayer Is always packed firmly Always has sugar molecules Is always moving Is destroyed

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 4SA: Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids;...

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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

Cholesterol maintains the fluidity and stability of membranes at different temperatures. Cholesterol, therefore, ensures that the lipid bilayer

Is always packed firmly
Always has sugar molecules
Is always moving
Is destroyed

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