Which of the following statements about the phospholipid bilayer of the cell membrane is false

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 hydrophobicPhospholipids 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 celluloseCell membrane is composed of phospholipid bilayer, cholesterol, glycolipids with embedded proteins like glycoproteins and transport proteins.

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What is true of the phospholipid bilayer of the cell membrane?

Part of the cell membrane is a phospholipid bilayer, made of two layers of phospholipid molecules. However, the cell membrane also contains other macromolecules like membrane proteins, and carbohydrates. Therefore, we can say that the cell membrane is made of a phospholipid bilayer, but it is not only made of it.

Which statement is true about the phospholipid bilayer?

Which statement is true about the phospholipid bilayer? The hydrophobic tails face each other in the center of the bilayer.

Which statement is not true of membrane phospholipid?

Phospholipids are free to diffuse within the hydrophobic core of membranes but not from one lipid-rich region on one surface to an adjacent lipid-rich region on the other surface. Thus, the correct answer is option D.

Which of the following statement regarding cellular membrane is not true?

So, the correct answer is 'Carbohydrates are never found in it'