Can proteins in the plasma membrane move around the membrane? why is this characteristic beneficial to the cell?

Yes they can

Explanation:

Based on the fluid mosaic model of the lipidic bilayer of the membranes we know that proteins embedded in it have the ability to undergo translational diffusion. Membrane fluidity is important to the cell because is associated to transport rates, it can respond to the necessities of the organism, for example, in some organisms this fluidity can be modified by temperature stress or according to their nutrient necessities.

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the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.