Cell Unit FRQ Practice
1. Cells transport substances across their membranes. Choose THREE of the following four
types of cellular transport.
Osmosis
Active transport
Facilitated diffusion
Endocytosis/exocytosis
For each of the three transport types you choose,
a) describe the transport process and explain how the organization of cell membranes functions
in the movement of specific molecules across membranes; and
b) explain the significance of each type of transport to a specific cell (you may use different cell
types as examples.)
2. Explain the endosymbiotic theory of the origin of eukaryotic cells and discuss two examples
of evidence supporting this theory.
3. Prokaryotic and eukaryotic cells have some non-membrane-bound components in common.
Describe the function of TWO of the following and discuss how each differs in prokaryotes and
eukaryotes. DNA, Cell wall, Ribosomes
4. A difference in prokaryotes and eukaryotes is seen in the organization of their genetic
material. Discuss these differences.
5. Membranes are essential components of all cells. Identify THREE macromolecules that are
components of the plasma membrane in a eukaryotic cell and discuss the structure and function
of each.
6.The following data were collected by observing subcellular structures of three different types
of eukaryotic cells. RELATIVE AMOUNTS OF ORGANELLES IN THREE CELL TYPES Cell
Type Smooth ER Rough ER Mitochondria Cilia Golgi Bodies X Small amount Small amount
Large number Present Small amount Y Large amount Large amount Moderate number Absent
Large amount Z Absent Absent Absent Absent Absent Based on an analysis of the data, identify
a likely primary function of each cell type and explain how the data support the identification.
Go to Diffusion/Osmosis Challenge