Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 2)
1
How does the concentration gradient affect the rate of diffusion?
Answer
(A)
A steeper concentration gradient speeds up diffusion.
2
Which of the following are true about the cell membrane?
Answer
B
C
D
3
Which of the following is the primary purpose of facilitated diffusion?
Answer
(B)
To speed up the movement of molecules across the cell membrane.
4
Which of the following is a characteristic of a partially permeable membrane?
Answer
(B)
It allows only certain substances to pass through, while blocking others.
5
Which of the following processes is most directly involved in the maintenance of cell turgor pressure in plant cells?
Answer
(C)
Osmosis
6
How does the surface area of a cell impact the rate of diffusion?
Answer
(A)
A larger surface area speeds up diffusion.
7
What are the characteristics of a cell in a turgid state?
Answer
A
C
8
Which of the following is not a role of active transport?
Answer
(C)
Movement of gases across the alveoli
9
What will happen to a red blood cell placed in a hypotonic solution?
Answer
(B)
The cell will burst.
10
What is the role of a protein channel in facilitated diffusion?
Answer
(C)
To allow specific molecules to pass through the cell membrane.
11
What would happen to a cell if its membrane became freely permeable?
Answer
(A)
The cell would be unable to regulate its internal environment.
12
What is the main driving force behind diffusion?
Answer
(B)
Concentration gradient
13
What is the role of carrier proteins in active transport?
Answer
(C)
To bind to the transported molecules and facilitate their passage across the membrane.
14
Which of the following are examples of passive transport?
Answer
A
C
D
15
Which of the following best describes what happens during facilitated diffusion?
Answer
(B)
Molecules move down their concentration gradient with the help of a protein.
16
Which of the following processes is NOT a form of passive transport?
Answer
(C)
Active transport
17
What is the role of ATP in active transport?
Answer
(A)
It provides the energy for the transport process.
18
How does temperature affect the rate of diffusion?
Answer
(C)
Higher temperatures increase the rate of diffusion.
19
Which type of transport is responsible for the movement of large molecules into or out of a cell?
Answer
(D)
Endocytosis/Exocytosis
20
What is the direction of water movement during osmosis?
Answer
(B)
From an area of low solute concentration to an area of high solute concentration.
21
What will happen to a plant cell if it is placed in a hypotonic solution?
Answer
(B)
The cell will become turgid.
22
What is the role of the cell wall in a plant cell?
Answer
(B)
To provide support and prevent the cell from bursting.
23
What would happen if a cell lacked a semi-permeable membrane?
Answer
(C)
The cell would be unable to regulate its internal environment.
24
In which environment will a plant cell be most turgid?
Answer
(B)
Hypotonic Solution
25
What are the requirements for facilitated diffusion?
Answer
A
C
D
26
Which transport mechanism does not involve a membrane protein?
Answer
(A)
Diffusion
27
What is the main purpose of the cell membrane?
Answer
(B)
To control the movement of substances into and out of the cell.
28
What is the result of a plant cell being placed in a hypotonic solution?
Answer
(B)
The cell becomes turgid.
29
What are the roles of the cell membrane?
Answer
A
C
D
30
Which of the following describes a characteristic of a hypertonic solution?
Answer
B
C
31
Which process is responsible for the movement of materials across the cell membrane against their concentration gradient?
Answer
(C)
Active transport
32
In a dialysis tubing experiment representing a cell, which of the following would demonstrate that osmosis has occurred?
Answer
(C)
The mass of the tubing would increase.
33
What is the difference between a concentrated and dilute solution?
Answer
(C)
A concentrated solution has a lower concentration of solute than a dilute solution.
34
In which scenarios would you expect to find a cell in a state of plasmolysis?
Answer
B
C
35
Which of the following is a factor affecting the rate of diffusion?
Answer
A
B
C
36
What type of transport requires energy input to move molecules against their concentration gradient?
Answer
(D)
Active transport
37
Which of the following is a key difference between active transport and facilitated diffusion?
Answer
A
C
D
38
What is a key difference between facilitated diffusion and diffusion?
Answer
(C)
Facilitated diffusion uses transport proteins while diffusion does not.
39
What type of transport mechanism is used when a cell engulfs a large particle?
Answer
(D)
Endocytosis
40
How does the size of a molecule affect the rate of diffusion?
Answer
(D)
Smaller molecules diffuse faster.
41
Which of the following statements about diffusion is true?
Answer
(C)
Diffusion is a passive process.
42
What type of transport does not require a protein to move molecules across a cell membrane?
Answer
(D)
Diffusion
43
What are the main differences between facilitated diffusion and active transport?
Answer
B
D
44
Which of the following statements is true regarding the effects of temperature on diffusion?
Answer
(A)
Higher temperatures increase the rate of diffusion.
45
Which process is represented by the movement of water molecules from an area of high water potential to an area of low water potential through a selectively permeable membrane?
Answer
(B)
Osmosis
46
Which of the following is the best description of plasmolysis in a plant cell?
Answer
(B)
The cell membrane separating from the cell wall due to water loss.
47
Which of the following is an example of a substance entering a cell by active transport?
Answer
(C)
Sodium ions moving out of a nerve cell.
48
What will happen to a plant cell in distilled water?
Answer
(B)
It will become turgid.
49
Which of the following is an example of osmosis?
Answer
(B)
The movement of water into a root hair cell.
50
Which term is used to describe the state of a plant cell where the cytoplasm is pressed against the cell wall due to water uptake?
