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 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 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 no energy

Answer 1

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

Active transport requires energy (e.g., ATP) to move substances against their concentration gradient, which is why endocytosis and exocytosis are considered active.