Final answer:
Endocytosis is the process that allows reactants to enter the cell and waste to exit, which is a type of active transport requiring energy.
Step-by-step explanation:
The recently discussed process that enables the reactants to enter the cell and the waste to exit the cell is endocytosis. Endocytosis is a type of active transport that involves the cell membrane engulfing material to bring it into the cell.
This process requires energy, typically in the form of ATP (adenosine triphosphate), and allows for the uptake of large particles, such as macromolecules, parts of cells, or even entire cells, into a cell. Conversely, exocytosis is the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell, which is also an example of active transport.