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:

most community's take hundreds of years to become stable

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.