Question

Fluidity of the cell membrane is a measure of the _____

(a) ability of water to pass through the membrane

(b) ability of potassium ions to pass through the membrane

(c) ability of sodium ions to pass through the membrane

(d) ability to move within the membrane

The question was asked in an internship interview.

This key question is from Eukaryotic Cells and it’s Organelles topic in section Cell : The Unit of Life of Biology – Class 11

Answer 1

Correct choice is (d) ability to move within the membrane

Easiest explanation: Fluidity of the cell membrane is the measure of the ability to move within the membrane. This movement is allowed due to the quasi-fluid nature of lipid present in the cell membrane.