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Question
Which of the following is not a constituent of cell membrane?
Which of the following is not a constituent of cell membrane?
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Solution
The correct option is B Proline
The biological membranes are essentially made up of lipids and proteins. The three main lipid constituents of cell membranes are phospholipids, glycolipids and sterols. The phospholipids contain a phosphate moiety in the hydrophilic head. They can be distinguished into glycerophospholipids with a glycerol backbone and a sphingophospholipids based on 4 sphingosine.
Glycolipids contain one or more monosaccharide residues and are based on 4-sphingosine or ceramide. The steroids are sterol alcohols which contain a cyclopentanone perhydrophenanthrene nucleus. Cholesterol is the most common sterol in animal cell membranes. Proline is an amino acid. It is generally not present in the biological membranes.
The biological membranes are essentially made up of lipids and proteins. The three main lipid constituents of cell membranes are phospholipids, glycolipids and sterols. The phospholipids contain a phosphate moiety in the hydrophilic head. They can be distinguished into glycerophospholipids with a glycerol backbone and a sphingophospholipids based on 4 sphingosine.
Glycolipids contain one or more monosaccharide residues and are based on 4-sphingosine or ceramide. The steroids are sterol alcohols which contain a cyclopentanone perhydrophenanthrene nucleus. Cholesterol is the most common sterol in animal cell membranes. Proline is an amino acid. It is generally not present in the biological membranes.
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