Can anyone explain why cholestrol ate highly exclusive to only animals?

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Can anyone explain why cholestrol ate highly exclusive to only animals?

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Can anyone explain why cholestrol ate highly exclusive to only animals...

Cholesterol is also a key regulator of membrane fluidity in animals. It is able to insert itself into bilayers perpendicular to the membrane plane. The hydroxyl group forms hydrogen bonds with the carbonyl oxygen of a phospholipid head group while the hydrocarbon tail positions itself in the non-polar core of the bilayer. Since the structure of cholesterol differs from phospholipids, it disrupts the normal reactions between fatty acid chains. Cholesterol is also able to form lipid rafts when it forms specific complexes with certain phospholipids, which resultsa in membranes that are less fluid and less subject to phase transitions

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Suppose that the surface area of an erythrocyte is 167 μm2. Also, suppose that the membrane of this erythrocyte contains 4.15x10-16mol of phospholipid and 3.1 x 10-16 mol of cholesterol.The cross-sectional area of a phospholipid molecule is 0.7 nm2 and that of a cholesterol molecule is 0.38nm2. Phospholipid and cholesterol isolated from this membrane were spread into a monolayer. The ratioof the area of this monolayer to that of the erythrocyte is approximately_________ .[Answer upto one decimal place] Correct answer is between '1.3,1.6'. Can you explain this answer?

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The correct prder of basicities of following compounds ? 1 ch3ch(nh)nh2 2ch3ch2nh2 3 (ch3) 2nh 4 ch3 conh2 Ans:1>3>2>4 Can anyone please explain why? Thanks for the reply?

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Can anyone explain why cholestrol ate highly exclusive to only animals?

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