1395659

TRUE OR FALSE? Correct the statement if it is false.

1.) A shallow concentration gradient limits the rate of
facilitated diffusion

2.) Symport and antiport are coupled transport systems in which
energy released by moving an ion from a region of high
concentration to low concentration is used to move a solute against
its concentration gradient

3.) Transport of siderophore-ion complexes into the cell
requires the hydrolysis of PEP

4.) Both ABC transport and PTS transport are modular systems
which ceoncentrate the substrate in the cell