AIPMT PRELIMS2005Botany-Cell Biology
AIPMT PRELIMS 2005 Botany Cell Membrane Structure MCQ Question
Type: MCQ-conceptual-Medium-Class 11
According to widely accepted "fluid mosaic model" cell membranes are semi-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?
A
Proteins in cell membranes can travel within the lipid bilayer
B
Proteins can remain confined within certain domains of the membrane
C
Proteins can also undergo flip-flop movements in the lipid bilayer
D
Many proteins remain completely embedded within the lipid bilayer
Correct Answer
Option C
Detailed Explanation
Proteins do not typically undergo flip-flop movements as this would require them to traverse the hydrophobic core of the lipid bilayer, which is energetically unfavorable.
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