The concept of a membrane as a fluid mosaic reflects the ability of a. most proteins but not phospholipids to drift about in the plane of the membrane b. carbohydrates to drift into and out of the membrane structure c. phospholipids but not proteins to drift about in the plane of the membrane d. phospholipids and most proteins to drift about in the plane of the membrane

The correct answer is D. phospholipids and most proteins to drift about in the plane of the membrane

Explanation:

The fluid mosaic model tells us about the structure and behavior of the cell membrane. This model shows that the membrane is a mosaic of various components that provides fluidity in the membrane and these components are phospholipids, proteins, cholesterol, and carbohydrate.

So due to this fluid nature of membrane, the phospholipids and most of the protein in the membrane can do lateral drift that means they can drift about the plane of the membrane. The lateral movement of phospholipids is rapid than proteins because proteins are bigger than lipids.  

This movement of components is necessary to transport the substance across the cell. So the correct answer is D.

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