Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 1)
1
What type of transport does not require the use of a protein channel?
2
In which of the following scenarios would you NOT expect to see active transport occurring?
Answer(C)
Movement of oxygen into red blood cells.
3
Which of the following is an example of active transport?
Answer(C)
The uptake of glucose by the cells lining the small intestine.
4
Which of the following is NOT a characteristic of active transport?
Answer(D)
It moves molecules down the concentration gradient.
5
In a plant cell, what happens to the cell when placed in a hypertonic solution?
Answer(C)
The cell undergoes plasmolysis.
6
What is the primary function of carrier proteins in facilitated diffusion?
Answer(C)
To bind to specific molecules and assist their movement across the membrane.
7
Which of the following processes involve a selectively permeable membrane?
8
Which is the most accurate description of a hypertonic solution?
Answer(B)
A solution with a higher solute concentration than the cell.
9
What factors can influence the rate of active transport?
10
What is the effect of placing a plant cell in a hypertonic solution?
Answer(B)
The cell will undergo plasmolysis.
11
Which of the following processes does NOT require energy to occur?
12
What is the term for the pressure exerted by water inside a plant cell against the cell wall?
13
What is the term for the bursting of a cell due to excessive water uptake?
14
Which process requires the expenditure of cellular energy?
15
Where does active transport get the energy it requires?
Answer(C)
From ATP (adenosine triphosphate).
16
What process is used to transport water across a cell membrane?
17
Which of the following statements about active transport is correct?
Answer(D)
It involves carrier proteins.
18
In which type of solution would a plant cell be flaccid?
19
Which process is responsible for the movement of water across a cell membrane?
20
What will happen to a plant cell placed in a concentrated salt solution?
Answer(B)
The cell will become plasmolysed.
21
How does the surface area of a cell affect diffusion?
Answer(A)
A larger surface area increases the rate of diffusion.
22
What type of solution will cause the most water to enter a cell by osmosis?
23
Which of the following processes are considered passive transport?
24
Which type of solution will cause a cell to shrink?
25
In which environment would a cell be most likely to experience lysis?
26
What type of transport is involved in the movement of glucose from the lumen of the small intestine into the epithelial cells lining the intestine?
27
Which of the following statements is correct regarding the water potential of a solution?
Answer(B)
The addition of solutes decreases the water potential.
28
What is the difference between diffusion and active transport?
Answer(C)
Diffusion is a passive process, while active transport requires energy.
29
In what type of transport process do molecules move through protein channels?
30
Which of the following is the best example of diffusion?
Answer(A)
The movement of oxygen from the lungs into the bloodstream.
31
What happens to a plant cell when placed in a hypotonic solution?
32
Which of the following are roles that a cell membrane plays?
33
Which of the following best describes a selectively permeable membrane?
Answer(B)
A membrane that allows only certain substances to pass through it.
34
What happens when a plant cell is placed in a solution with a lower water potential than the cell?
35
Which of the following is a main advantage of facilitated diffusion compared to simple diffusion?
Answer(B)
Facilitated diffusion is faster for moving larger molecules.
36
Which of the following processes can be affected by a change in temperature?
37
Which of the following best explains why cells need to control the movement of substances across their membranes?
Answer(B)
To maintain a stable internal environment.
38
If a cell is placed in a solution, and the cell gains mass, which process is most likely occurring?
39
Which of the following factors does NOT affect the rate of diffusion?
Answer(D)
Presence of a semi-permeable membrane
40
What is the term used to describe the movement of water across a semi-permeable membrane?
41
Which of the following statements is true about the rate of diffusion?
Answer(D)
The rate of diffusion is faster with a larger concentration gradient.
42
What is the relationship between a cell membrane and the process of osmosis?
Answer(B)
The cell membrane acts as a selectively permeable membrane for osmosis.
43
Which statement best explains the movement of water molecules during osmosis?
Answer(B)
Water moves from an area of low water potential to an area of high water potential.
44
Which of the following is true about the cell wall?
45
What does the term 'turgor pressure' refer to in plant cells?
Answer(B)
The pressure exerted by the cytoplasm on the cell wall.
46
What is the effect of increasing the concentration gradient on the rate of diffusion?
Answer(A)
It increases the rate of diffusion.
47
Which of the following scenarios is an example of active transport?
Answer(C)
Glucose being transported into an intestinal cell against its concentration gradient.
48
If a cell is placed in an isotonic solution, what happens to the cell?
Answer(C)
The cell remains the same size.
49
In what type of solution will a cell swell and possibly lyse?
50
Which of the following are factors that affect the rate of diffusion?
