25. Which of the following statement(s) is correct regarding to the membrane transport? 1. Integral membrane protein is likely to contain one or more hydrophobic segments, 20-30 amino acids long. 2. Exocytosis involves the cell engulfing matter from the outside environment. 3. The voltage-gated potassium channels associated with an action potential provide an example of coupled transport
(A) 1 and 3
(B) 2 and 3
(C) 1 only
(D) 1 and 2
(E) All of above are correct.
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