question_answer 34)

  Amoeba acquires its food through a process, termed (a) exocytosis                                                                    (b) endocytosis                                 (c) plasmolysis                                                                   (d) Both exocytosis and endocytosis both

Answer:

  (b) Endocytosis is the ingestion of material by the cells through their plasma membrane. It is a collective term that describes three similar processes phagocytosis (cell eating), potocytosis (cell drinking) and receptor-mediated endocytosis. These processes are pathways to specifically internalize solid particles, small molecules and ion, and macromolecules, respectively. All of them require energy, so they may be regarded as different forms of active transport. Out of these phagocytosis is the common method of feeding among the Protozoa (e.g., Amoeba) and lower Metazoa (e.g., sponges). In pseudopodial movement the phagocyte enguls the particle lysosomes, join with the vacoule containing ingested particle and pour their contents into the vacoule to destroy the particle.