Question

Question
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 down a concentration gradient from high to low, using no energy
the movement of molecules down a concentration gradient from high to low, using no energy

the movement of molecules up a concentration gradient from low to high, using energy

Answer 1

the movement of molecules up a concentration gradient from low to high, using energy

(Active transport requires energy—often ATP—to move substances against their concentration gradient; endocytosis/exocytosis are energy-dependent bulk transport processes.)