Which of the following best describes an aspect of a membrane's molecular structure that causes it to be selectively permeable?

Carrier proteins on either side of the membrane slow the traffic of large molecules into the cell.

Nonpolar molecules cannot dissolve in the polar membrane and do not enter the cell easily.

The lipid bilayer is hydrophilic and allows polar molecules to enter the cell easily.

Transport proteins within the membrane serve as a tunnel for molecules to enter the cell.

Question

Which of the following best describes an aspect of a membrane's molecular structure that causes it to be selectively permeable?

 Carrier proteins on either side of the membrane slow the traffic of large molecules into the cell.

 Nonpolar molecules cannot dissolve in the polar membrane and do not enter the cell easily.

 The lipid bilayer is hydrophilic and allows polar molecules to enter the cell easily.

 Transport proteins within the membrane serve as a tunnel for molecules to enter the cell.

anonymous · Answer

)Transport proteins within the membrane serve as a tunnel for molecules to enter the cell.