Question

Fluidity of bio-membranes can be shown by

• A. Electron microscope
• B. Tissue culture
• C. Phase-contrast microscope
• D. Fluorescence microscope

Answer 1

The correct option is D Fluorescence microscope

In biology, membrane fluidity refers to the viscosity of the lipid bilayer of a cell membrane or a synthetic lipid membrane.

Laurdan was first applied to study membrane fluidity of live cells with a 2-Photon fluorescence microscope in 1994. A fluorescence microscope is an optical microscope that uses fluorescence and phosphorescence instead of, or in addition to, reflection and absorption to study properties of organic or inorganic substances.It is used to investigate membrane qualities of the phospholipid bilayers of the cell. Hence, option D is correct.