The lipid molecules present in plasma membrane have polar heads and non-polar tails (as shown in figure). Which option represents the correct arrangement of lipids in lipid bilayer?

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Solution

The correct option is B
In fluid mosaic model of plasma membrane, phospholipids are arranged in bilayers and proteins are embedded in it. The polar hydrophillic heads of the phospholipids lies towards the outer sides of the bilayer and the non-polar hydrophobic tails lie towards the inner side of the bilayer.

Figure: Arrange of phospholipid bilayer in biological membranes

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Question 11

Which of the following statement is not true for plasma membrane?

(a) It is present in both plant and animal cell

(b) Lipid is present as a bilayer in it

(d) Carbohydrate is never found in it

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