Chapter 5 Review

C

A plant cell that is placed in a hypertonic solution would experience a. Crenation b. An increase in turgor pressure c. Plasmolysis d. No net changes

B

In the fluid mosaic model, the fluid properties are associated with the nature of the ___ and the mosaic pattern is established by the ____. a. Nucleic acids; phospholipids b. Phospholipids; embedded proteins c. Embedded proteins; cholesterol. d. Phospholipids; nucleic acids.

D

The carbohydrate chains projecting from the plasma membrane are involved in a. Adhesion between cells. b. reception between molecules c. Cell to cell recognition d. All of the above

E

The extracellular matrix a. Assists in the movement of substances across the plasma membrane. b. Prevents the loss of water when cells are placed in a hypertonic solution. c. Has numerous functions that affect the shape and activities of the cell that produced it. d. Contains the junctions that sometimes occur between cells. e. All of these are correct.

E

The sodium potassium pump a. Helps establish an electrochemical gradient across the membrane. b. Concentrates energy on the outside of the membrane. c. Uses a carrier protein and chemical energy. d. Is present in the plasma membrane. e. All of the above are correct.

C

When a cell is placed in a hypertonic solution, a. Solute exits the cell to equalize the concentration on both sides of the membrane. b. Water exits the cell toward the area of lower solute concentration. c. Water exits the cell toward the area of higher solute concentration. d. There is no net movement of water or solutes.

C

When a cell is placed in a hypotonic solution, a. Solute exits the cell to equalize the concentration on both sides of the membrane. b. Water exits the cell toward the area of lower solute concentration. c. Water enters the cell toward the area of higher solute concentration. d. There is no net movement of water or solutes.

B

Which of the following in incorrect regarding facilitated diffusion? a. It is a passage process b. It allows the movement of molecules from areas of low concentration to areas of high concentration. c. It may use either channel or carrier proteins. d. It allows the rapid transport of glucose across the membrane.

E

Which of the following is not a function of proteins present in the plasma membrane? a. Proteins assists in the passage of materials into the cell. b. Proteins interact and recognize other cells. c. Proteins bind with specific hormones. d. Proteins carry out specific metabolic reactions. e. Proteins produce lipid molecules.

C

Which of the following junctions allows for cytoplasm to move between cells? a. adhesion junctions. b. tight junctions. c. gap junctions. d. None of these are correct.

D

Which of the following processes is involved in the bulk transport of molecules out of the cell? a. phagocytosis b. pinocytosis c. receptor mediated endocytosis d. exocytosis e. None of the above

C

Which of the processes uses special proteins on the surface of the membrane to identify specific molecules for the transport into the cell? a. Phagocytosis b. pinocytosis c. receptor mediated endocytosis d. exocytosis