Have an account?
Skip to Content
Build your own quiz
Suggestions for you
16 questions
Show Answers
See Preview
- 1. Multiple Choice
The diagram shows the fluid mosaic model of membrane structure.
Which would enable a hormone to recognise its target cell?
A
B
C
D
- 2. Multiple Choice
The diagram shows a cell surface membrane.
Which statements about the labelled molecules in the membrane are correct?
· 1 is involved in the diffusion of ions
· 2 is involved in facilitated diffusion
· 3 is involved in the recognition of antigens
· 4 is involved in membrane fluidity
1, 2 and 3
1 and 3 only
1 and 4 only
2 and 4 only
1, 2, 3 and 4
- 3. Multiple Choice
Which of the following can increase the fluidity of the cell surface membrane at low temperatures?
1. double bonds between carbon atoms in the fatty acid chains
2. cholesterol
3. fatty acids having shorter chains
1, 2 and 3
1 and 3 only
2 and 3 only
1 only
3 only
- 4. Multiple Choice
What describes the fluid-mosaic model of membrane structure?
Cholesterol makes the membrane more fluid
Fluids can cross the membrane by diffusion or osmosis.
Proteins act as receptors for cell signaling.
Proteins and phospholipids move and change places.
none of the above
- 5. Multiple Choice
A plant cell is placed in a solution with a less negative (higher) water potential than the cell contents.
From the table above, which change occurs in the cell and what causes the change?
A
B
C
D
- 6. Multiple Choice
What happens to an animal cell when it is placed in a solution with a more negative water potential?
It loses solutes to the solution and swells.
It loses water by osmosis and shrinks.
It takes in solutes and swells.
It takes in water by osmosis and bursts.
Nothing happens
- 7. Multiple Choice
Which pair of factors is inversely proportional to the rate of diffusion?
concentration gradient and size of diffusing molecule
distance over which diffusion occurs and surface area over which diffusion occurs
size of diffusing molecule and distance over which diffusion occurs
surface area over which diffusion occurs and concentration gradient
none of the above
- 8. Multiple Choice
Which statement suggests that a membrane protein is involved in active transport?
It allows movement of molecules across a membrane if concentration differences exist.
It can only function if mitochondria are supplied with sufficient oxygen.
It is found in the cell surface membranes and the mitochondrial membranes.
It has a tertiary structure with a binding site with a specific shape.
all of the above
- 9. Multiple Choice
What are the features of facilitated diffusion?
A
B
C
D
- 10. Multiple Choice
Equal sized potato pieces were placed into test-tubes containing equal volumes of different concentrations of sucrose solution and left for 30 minutes. All other variables were controlled.
After 30 minutes, the potato piece in one of the concentrations of sucrose solution had not changed in size.
What can be concluded from this result?
1. There is no net movement of water into or out of the potato.
2. The water potential of the potato is the same as the water potential of the sucrose solution.
3. The concentration of sucrose in the potato is the same as the concentration of the sucrose solution.
1, 2 and 3
1 and 3 only
1 and 2 only
2 only
3 only
- 11. Multiple Choice
The graph shows how the rate of entry of glucose into a cell changes as the concentration o glucose outside the cell changes.
What is the cause of the plateau at X?
1. All the carrier proteins are saturated with glucose.
2. The cell has used up its supply of ATP
3. The concentrations of glucose inside and outside the cell are equal.
1, 2 and 3
3 only
2 only
2 and 3 only
1 only
- 12. Multiple Choice
A plant cell with a water potential of –600 kPa was placed in a solution with a water potential of –410 kPa for 10 minutes.
Which row is correct?
A
B
C
D
- 13. Multiple Choice
The stalk of a dandelion flower is a hollow tube. Pieces of the stalk are cut as shown and placed in sucrose solutions of different water potentials.
- 14. Multiple Choice
Which statements about the components of the cell surface membrane are correct?
1. Diffusion can take place through lipids and protein pores.
2. Endocytosis only involves lipids.
3. Facilitated diffusion only involves proteins.
4. Osmosis only involves proteins.
1, 2, 3 and 4
1, 3 and 4 only
1 and 3 only
2 and 4 only
1 and 2 only
- 15. Multiple Choice
The diagram shows part of a cell surface membrane.
Which molecules have both hydrophobic and hydrophilic regions?
1 and 5 only
1, 3 and 5 only
1, 2, 4 and 5
2, 3 and 4 only
2 and 4 only
- 16. Multiple Choice
A student put a layer of plant epidermal cells on a microscope slide. The student put a drop of potassium nitrate solution on the layer of cells and observed that:
· the cell surface membrane of many of the cells had separated from the cell wall
· the cytoplasm and cell contents had shrunk.
What explains these observations?
A
B
C
D
- Answer choicesTagsAnswer choicesTags