The movement of a particular amino acid across the cell membrane (alongs its concentrations gradient) is?

Question

impaired when a molecule chemically similar to the amino acid is added to the extracellular fluid. The movement of the amino acid through the membrane is by:

a. pinocytosis
b. facilitated diffusion
c. active transport
d. diffusion
e. osmosis

Answer 1

Facilitated diffusion: AA are charged and not lipid soluble so they are not getting through a membrane unless they have a carrier protein

Answer 2

cell membrance

Answer 3

d. diffusion