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Question

Plasma membrane is made up of:


A

Carbohydrate layer

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B

Silicon layer

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C

cholesterol layer

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D

phospho lipid layer.

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Solution

The correct option is C

phospho lipid layer.


The plasma membrane is composed mainly of phospholipids. They are arranged in two layers, called a phospholipid bilayer. Each phospholipid molecule has a head and two tails. The head “loves” water (hydrophilic) and the tail “hates” water (hydrophobic). The water-hating tails are on the interior of the membrane, whereas the water-loving heads point outwards, toward either the cytoplasm or the fluid that surrounds the cell.


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