Question

Why is endocytosis found in animals only?

• A. Cell wall is absent in animal cells.
• B. Cell wall is present in animal cells.
• C. Cell membrane is absent in animal cells.
• D. None of these

Answer 1

The correct option is A Cell wall is absent in animal cells.

• Endocytosis is not associated with plant cells. They get their nutrients mostly by osmosis and plasmodesmata.
• Endocytosis is a process, where cells absorb material (molecules such as proteins) from the outside by engulfing it with their cell membrane.
• Since plant cells have a cell wall covering around their cell membrane, endocytosis is not possible. It is used by animal cells because most substances important to them are large polar molecules, and thus, cannot pass through the plasma membrane.
• Thus, the correct answer is option A.