Becker's World of the Cell 9th Edition by Lewis Kleinsmith, Jeff Hardin, Gregory Paul Bertoni

Exercise 6

Cellular Digestion. For each of the following statements, indicate the specific digestion process or processes of which the statement is true: phagocytosis (P), receptor-mediated endocytosis (R), autophagy (A), or extracellular digestion (E). Each statement may be true of one, several, or none (N)of these processes.
(a)Can involve exocytosis.
(b)Can involve fusion of vesicles or vacuoles with a lysosome.
(c)Digested material is of extracellular origin.
(d)Digested material is of intracellular origin.
(e)Essential for sperm penetration of the egg during fertilization.
(f)Important for certain developmental processes.
(g)Involves acid hydrolases.
(h)Involves fusion of endocytic vesicles with an early endosome.
(i)Involves fusion of lysosomes with the plasma membrane.
(j)Occurs within lysosomes.
(k)Serves as a source of nutrients within the cell.