THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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one polar phosphate head and two nonpolar fatty acid tails
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one polar phosphate head and two polar fatty acid tails
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optional proteins
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barrier proteins
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Detailed explanation-1: -The main component of the cell membrane is a phospholipid bi-layer or sandwich. The heads (the phospho part) are polar while the tails (the lipid part) are non-polar.
Detailed explanation-2: -Phospholipids consist of two hydrophobic “tails, ” which are fatty acid chains, and one hydrophilic “head, ” which is phosphate group.
Detailed explanation-3: -All of the lipid molecules in cell membranes are amphipathic (or amphiphilic)-that is, they have a hydrophilic (“water-loving”) or polar end and a hydrophobic (“water-fearing”) or nonpolar end. The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails.
Detailed explanation-4: -Phospholipids are molecules that form the cell membrane. They consist of a polar phosphate head group and two nonpolar fatty acid tails joined by a glycerol backbone.