By which of the following mechanisms can a cell transport a substance from a lower to a higher concentration?
A) simple diffusion
B) facilitated diffusion
C) active transport
D) extracellular enzymes
E) aquaporins
Answer: C
By which of the following mechanisms can a cell transport a substance from a lower to a higher concentration?
A) simple diffusion
B) facilitated diffusion
C) active transport
D) extracellular enzymes
E) aquaporins
Answer: C