1. What organelle

a. is composed of RNA and protein?

b. is composed of a system of canals for transport of molecules through the cell?

c. is the site where the most energy is obtained from carbohydrates?

d. is the site of packaging of cellular secretions?

e. is not found in animal cells?

f. is found in the nucleus?

g. is a fluid-filled sac that stores food and water?

h. contains enzymes for intracellular digestion?

1. Would a cell be able to survive without mitochondria? Why or why not?

2. Do you think that a plant cell, which already has a stiff, strong cell wall, still really needs a cell membrane? Explain why or why not.