The transportation mechanism in cells by which food or other useful molecules from the outside are carried inside the cell is known as _______________.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Endocytosis.
The transportation mechanism in cells by which food or other useful molecules from the outside are carried inside the cell is known as endocytosis. It is an active transport process where the cell membrane folds inward to engulf external substances, forming a vesicle that brings them into the cell. Endocytosis allows cells to intake nutrients, fluids, and even larger particles like bacteria. There are two main types: phagocytosis (cell eating) for solid particles and pinocytosis (cell drinking) for liquids. This process is essential for cell survival, communication, and immune responses, helping cells interact with their external environment efficiently.