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Question

(D) The cell membrane is composed of a lipid bilayer with embedded proteins. Water-soluble substances cannot pass through the hydrophobic lipid bilaye

Vedclass · Accepted Answer

Spanning across the entire membrane.

Vedclass · Answer

(D) The cell membrane is composed of a lipid bilayer with embedded proteins. Water-soluble substances cannot pass through the hydrophobic lipid bilayer directly. To facilitate their transport,integral membrane proteins,also known as transmembrane proteins,span across the entire lipid bilayer. These proteins form channels or pores that provide a pathway for the movement of water-soluble substances,ions,and polar molecules across the membrane. Therefore,these proteins are described as spanning across the entire membrane.

The proteins that provide a pathway for the transport of water-soluble substances across the cell membrane are:

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