Anionic Intracellular Proteins (A⁻) Cannot Pass Through Membrane Carriers Because

Multiple Choice

Anionic intracellular proteins (A⁻) cannot pass through membrane carriers because A⁻ proteins

A) are charged
B) they can only pass through channels
C) are in about the same concentration in the cytosol and ECF
D) too large
E) are synthesized outside the cell, and carriers only transport them into the cell