Question

During endocytosis and exocytosis, cells _____. A. take in what they need and expel what they don't need. B. move water in and out through the cell membrane. C.actively transport molecules across the cell membrane.

Answer 1

Answer: The correct answer for the fill in the blank is A) Take in what they need and expel what they don't need.

Endocytosis is a process of intake/capture of particle or substance from outside the cell with the help of plasma membrane of the cell. The plamsa membrane surrounds the substance and forms a vesicle around it that finally pinches off and enters in the cytoplasm of the cell. Through endocytosis, cells  engulf the substances that they require ( like food particles).

On the other hand, exocytosis is a process of releasing contents outside the cell through fusion of vesicles with the plasma membrane. In this process, cells expel substances that they do not require ( like waste products or toxins)

Answer 2

During endocytosis and exocytosis, cells actively transport molecules across the cell membrane. The correct option among all the options that are given in the question is the third option or the last option or option "C". I hope that this is the answer that you were looking for and it has come to your great help.