Which of the Following is an Active Transport Mechanism

Question

Which of the following is an active transport mechanism?
A)Osmosis
B)Facilitated diffusion
C)Filtration
D)Pinocytosis

Accepted Answer

Pinocytosis is an active transport mechanism where cells engulf extracellular fluid and particles by invaginating their plasma membrane to form a vesicle. Osmosis, facilitated diffusion, and filtration are all passive transport mechanisms that do not require ATP energy expenditure.