According to widely accepted "fluid mosaic model" cell memb…

Biology NEET Full Syllabus Mock Test 180 Questions New Syllabus Mock Test - 3 PCB Single Correct MCQ

Published on: August 21, 2026

According to widely accepted "fluid mosaic model" cell membranes are scmi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

Proteins in cell membranes can travel within the lipid bilayer.

Proteins can also undergo flip-flop movements in the lipid bilayer.

Proteins can remain confined within certain domains of the membrane.

Many proteins remain completely embedded within the lipid bilayer.

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The correct answer is:

The quasi-fluid nature of lipid enable lateral movement of proteins within the overall bilayer. This ability to move within the membrane is measured as its fluidity.

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