Multiple choice

Cell membranes are dynamic structures constituted of various biochemical entities. Many models have been proposed for defining the structure and constitution of membranes. The most accepted of these is the Singer and Nicholsons’ fluid mosaic model. Based on the knowledge of Singer and Nicholsons’ model, answer the following:

Which of the following biochemical moieties are proposed to be biological constituents of plasma membrane?

  1. Glycoproteins and glycolipids

  2. Phospholipids and chitin

  3. Proteins, lipids, carbohydrates and their collaborative derivates

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Singer and Nicholson's fluid mosaic model states that plasma membranes are composed of proteins, lipids (phospholipids, cholesterol), and carbohydrates (as glycoproteins and glycolipids). Option C correctly lists all major constituents.

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