Question

According to the fluid mosaic model, the quasi-fluid nature of lipid enables lateral movement of protein within the overall, lipid bilayer. This ability to move within the membrane is measured as its

• A. Fluidity
• B. Movability
• C. Mobility
• D. All of the above

Answer 1

The correct option is A Fluidity

Fluidity of lipid bilayer
The whole membrane has a kind of fluid-like property to it. And that is because the fatty acid side chains of the cell are not rigid, and are not locked into place.
They are mostly floating around allowing the whole membrane to remain pretty flexible.

Fluidity of lipid bilayer
Based on the fluid mosaic model in the cell membrane, the quasi-fluid character allows the movement of proteins in the lipid bilayer.
This lateral movement of protein is allowed while being embedded inside the cell membrane and this is possible due to the fluidity of the membrane.

Final answer
$\left(B\right)$ Fluidity