AP BIOLOGY

LABORATORY REVIEW

DIFFUSION AND OSMOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the “big idea” of the fluid mosaic model of plasma membranes?
A
the plasma membrane creates a specialized FLUID that looks like a MOSAIC.
B
the plasma membrane is a MOSAIC.
C
the fluid mosaic model is NOT related to the plasma membrane.
D
a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.
Explanation: 

Detailed explanation-1: -According to the fluid mosaic model, the plasma membrane is a mosaic of components-primarily, phospholipids, cholesterol, and proteins-that move freely and fluidly in the plane of the membrane.

Detailed explanation-2: -The fluid mosaic model describes the cell membrane as a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving. This movement helps the cell membrane maintain its role as a barrier between the inside and outside of the cell environments.

Detailed explanation-3: -The fluid mosaic model describes the structure of the plasma membrane as a mosaic of components-including phospholipids, cholesterol, proteins, and carbohydrates-that gives the membrane a fluid character.

Detailed explanation-4: -The fluid mosaic hypothesis was formulated by Singer and Nicolson in the early 1970s [1]. According to this model, membranes are made up of lipids, proteins and carbohydrates (Figure 1). The main lipid membrane components are phospholipids.

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