In Marine Sponges,intracellular Digestion of Peptides is Usually Immediately Preceded

Question

In marine sponges,intracellular digestion of peptides is usually immediately preceded by
A)hydrolysis.
B)endocytosis.
C)absorption.
D)elimination.
E)secretion.

Accepted Answer

Intracellular digestion in marine sponges is accomplished primarily through phagocytosis, in which food particles are engulfed by cells and transported to intracellular digestive vacuoles. This process begins with endocytosis, in which the food particle is surrounded by the cell membrane and brought into the cell. Hydrolysis, absorption, and secretion all occur after the food particle has been taken into the cell. Elimination does not play a role in intracellular digestion within marine sponges. Therefore, the best choice to complete the sentence is B) endocytosis.