n the cell membrane bilayer: O most of the lipids have an inverted cone shape (headgroup region wider than the tail region on a lipid). O 3 of these 4 responses are correct O the hydrophobic lipid region is situated between the hydrophilic lipid regions. O negatively-charged lipids are located mainly in the outer leaflet of the bilayer. O cholesterol always works to make membranes more fluid, regardless of the circumstances.

n the cell membrane bilayer: O most of the lipids have an inverted cone shape (headgroup region wider than the tail region on a lipid). O 3 of these 4 responses are correct O the hydrophobic lipid region is situated between the hydrophilic lipid regions. O negatively-charged lipids are located mainly in the outer leaflet of the bilayer. O cholesterol always works to make membranes more fluid, regardless of the circumstances.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter3: Cell Structure

Section: Chapter Questions

Problem 8SQ: In a lipid bilayer, the of all the lipid molecules are sandwiched between all of the __________. a....

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Similar questions

Which of these general statements is TRUE about the lipid called phosphatidylcholine (or PC)? Group of answer choices PC is NOT an aminophospholipid. PC is zwitterionic at normal cell pH. PC resides mainly in the outer leaflet of the membrane bilayer. 3 of these 4 responses are correct PC is a type of cholesterol.
A biochemist performed a subcellular fractionion ( a separation of cell organelles) and them run TLC to measure the relative presense of defererent lipids. In one fraction there was an absence of cholesterol. What fraction was it? O plasma membrane O cytoplasm O lysosome mitochondria O nucleus
Which of these general statements is TRUE about the lipid called phosphatidylethanolamine (or PE)? PE is NOT an aminophospholipid. 3 of these 4 responses are correct PE resides mainly in the outer leaflet of the membrane bilayer. PE is zwitterionic at normal cell pH. PE is a type of cholesterol.
Which of the following statements about lipids in membranes is FALSE? O Membrane curvature may be controlled by the size of head groups in lipids O Lipids can move laterally within a membrane leaflet O Liposomes are synthesized membrane structures used to study membranes in the laboratory Flexion is when the hydrophobic tails of lipids swing and cross each other O Lipids flip-flop from the inner leaflet to the outer leaflet spontaneously
. Cholesterol is an integral part of plasma membranes. Based on its structure, where is it found in the membrane? On the extracellular surface embedded with the phospholipid heads within the tail bilayer attached to the intracellular surface
The plasma membrane has a hydrophobic interior due to the two present in each phospholipid found in the phospholipid bilayer of the cell membrane. The plasma membrane allows some molecules to cross but not all. Therefore, the plasma membrane is said to be Molecules that are nonpolar and hydrophobic will cross the membrane with ease by Does this process require energy? When molecules move across the plasma membrane by passive transport, they will move down or with the_ from an area of concentration to an area of. concentration. Polar, hydrophilic molecules and charged ions will move across the plasma membrane by the process of_ This does not require energy, but it does require a A special case of diffusion is known as which is the movement of water across the plasma membrane. If a cell is placed into a solution that is hypertonic compared to the inside of the cell, the cell would If a cell is placed into a hypotonic solution compared to the inside of the cell, the cell water. would…
The reason ions such as Na+, K+, and Ca2+ diffuse across plasma membranes more rapidly than would be expected across a lipid membrane is that their negative charge causes them to dissolve in the polar lipids in the membrane ions diffuse through polar lipids more readily than non-charged particles do their positive charge causes them to dissolve in the polar lipids in the membrane there are proteins that form channels through which these ions can more readily pass
Which of the following membrane lipids is mainly structural? Phosphatidylthanolamine All of the other answers are correct Phosphatidylcholine Spingomyelin Inositol phospholipids
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
Of the following cell membrane lipids, which one prefers to reside in the INNER leaflet (or inner half) of the membrane bilayer, AND is zwitterionic at physiological pH (7.4)? PS (phosphatidylserine) is inner-leaflet & zwitterionic PC (phosphatidylcholine) is inner-leaflet & zwitterionic 3 of these 4 responses are correct SM (sphingomyelin) is inner-leaflet & zwitterionic PE (phosphatidylethanolamine) is inner-leaflet & zwitterionic
If you shift cells from low temperature to high temperature, what lipid would you expect to increase in percentage within the membrane? saturated fatty acids monounsaturated fatty acids O polyunsaturated fatty acids
(Solve X Docum X G G Gramn X C Chegg X S APA Ci X Q The nu X Q Aldo W ollege.instructure.com/courses/2217236/quizzes/6997163/take A Question 19 1 pts What role does cholesterol play in the plasma membrane? Select the best answer. O It provides a patching medium, and helps maintain optimal fluidity of the membrane. OIt provides binding sites for signaling molecules at the membrane surface. OIt stores DNA in the membrane, to exchange genetic information with nearby cells. OIt provides a transport channel for charged molecules to pass through.