24. Which of the following statenent(s) is correct regarding to the membrane transport?
(1) If a transported molecule carries a net charge, its movement may be influenced by the electrochemical gradient.
 (2) All transport proteins, i.e. transporters, are transmembrane proteins containing multiple membrane-spanning segments.
 (3) Active transport requires ATPase to utilize ATP hydrolysis to move ions or snall molecules across the membrane from higherconcentration to lower concentration.
(A) 1 and 3
(B) 2 and 3
(C) 3 only
(D) 1 and 2
(E) All of above are correct.