Endocytosis and exocytosis are forms of active transport. What is active transport?(1 point) Responses the movement of molecules up a concentration gradient from low to high, using no energy the movement of molecules up a concentration gradient from low to high, using no energy the movement of molecules down a concentration gradient from high to low, using energy the movement of molecules down a concentration gradient from high to low, using energy the movement of molecules up a concentration gradient from low to high, using energy the movement of molecules up a concentration gradient from low to high, using energy the movement of molecules down a concentration gradient from high to low, using no energy

Answer 1

The correct definition of active transport is: the movement of molecules up a concentration gradient from low to high, using energy.