The polar heads face outward
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The nonpolar tails face inward
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The polar heads are hydrophobic
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The nonpolar tails are hydrophobic
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Solution
The correct option is C The polar heads are hydrophobic
Phospholipids are a class of lipids that are a major component of all cell membranes. They can form lipid bilayers because of their amphiphilic characteristic. The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid "tails" and a hydrophilic "head" consisting of a phosphate
group. The hydrophilic polar heads face outwards and the hydrophobic non-polar tails face inwards.
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They are composed of lipid
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They are semi-permeable in nature.
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They are composed of protein
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They are composed of cellulose
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Solution
The correct option is D They are composed of cellulose
Cell membrane is composed of phospholipid bilayer, cholesterol, glycolipids with embedded proteins like glycoproteins and transport proteins.
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