What role does cholesterol play in the plasma membrane? It provides a patching medium, and helps maintain optimal fluidity of the membrane. It provides binding sites for signaling molecules at the membrane surface. It stores DNA in the membrane, to exchange genetic information with nearby cells. It provides a transport channel for charged molecules to pass through.

What role does cholesterol play in the plasma membrane? It provides a patching medium, and helps maintain optimal fluidity of the membrane. It provides binding sites for signaling molecules at the membrane surface. It stores DNA in the membrane, to exchange genetic information with nearby cells. It provides a transport channel for charged molecules to pass through.

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 11RQ: The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a....

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Similar questions

Most of a membranes diverse functions are carried out by ________ . a. proteins c. nucleic acids b. phospholipids d. hormones
Which of the following methods of transport is being used to transfer the substance into the cell in the accompanying graph? a. diffusion down a concentration gradient b. osmosis c. facilitated diffusion d. active transport e. vesicular transport f. It is impossible to tell with the information provided.
In the fluid mosaic model: plasma membrane proteins orient their hydrophilic sides toward the internal bilayer. phospholipids often flip-flop between the inner and outer layers. the mosaic refers to proteins attached to the underlying cytoskeleton. the fluid refers to the phospholipid bilayer. the mosaic refers to the symmetry of the internal membrane proteins and sterols.
Cholesterol is abundant in the plasma membrane. Would you expect cholesterol to flipbetween the two leaflets of the membrane faster than phospholipids, or slower, or atthe same rate?
What features of a membrane are major contributors to its selectivepermeability?a. phospholipid bilayerb. transport proteinsc. glycolipids on the outer surface of the membraned. peripheral membrane proteinse. both a and b
The cell membrane regulates the movement of molecules in and out the cell. what other functions does the cell membrane perform?
What types of molecules move across the lipid bilayer ofthe plasma membrane via simple diffusion?
Which of the following molecules would you expect to diffuse through the lipid bilayer of a plasma membrane most rapidly? Na+ An amino acid Starch Glucose O2
In cell membrane, the regulation of membrane rigidity is the function of _____. While proteins ______ A. Carbohydrates; Cell recognition B. Cholesterol; Move nutrients and electrolytes across C. Lipid; Impart polarity to the interior membrane D. Fatty acids; Prevent tight packing of fatty acid chains E.Cholesterol; Act as receptors for neurotransmitter and hormone binding
Describe the chemical composition of membranes. What are the two most critical functions of membranes? What contributes to membrane fluidity and rigidity? Explain Diffusion. What are the differences between Osmosis and Dialysis? Explain the differences between Iso, Hypo, and Hypertonic conditions. If the solutions is Hypertonic then the cell would be?
What happens to phospholipid mobility when the cell is treated with agents that disrupt the underlying membrane skeleton? options: Their mobility is unchanged. Their mobility is increased because the fences that normally restrict their diffusion are removed. Their mobility is decreased because the fences that normally restrict their diffusion are removed. Their mobility is increased because the treatment raises the temperature.
which one of the following diffuses more readily through the lipid bilayer of a plasma membrane a. polar molecules b. non polar molecules c. ionized molecules d. water