Which statement explains the passage of a serine, an amino acid through the selectively permeable plasma membrane?

Which statement explains the passage of a serine, an amino acid through the selectively permeable plasma membrane?

A)

This molecule is too large to pass through the cell membrane.

B)

This molecule can pass through the cell membrane using a protein pump

and ATP.

C)

This molecule would easily pass through the phospholipid bilayer, due to

the polar side chains.

D

This molecule must utilize a transport protein to cross the cell membrane

due to its large size and polar side chains.

Explanation:

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