Movement in and out of Cells
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Diffusion
SubtopicDiffusion under Movement in and out of Cells for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
In which part of the human body does the diffusion of carbon dioxide from the blood into the air occur?
A.Villi in the small intestine
B.Alveoli in the lungs
C.Glomerulus in the kidney
D.Hepatic portal vein in the liver
- 2.
Diffusion is described as a 'passive' process. What does this specifically mean in biological systems?
A.It only happens in dead cells
B.It requires energy from aerobic respiration
C.It does not require energy from ATP to move particles
D.It only occurs in the liquid state
- 3.
Which of the following changes would increase the rate of diffusion of oxygen into an animal cell?
A.Increasing the surface area of the cell membrane
B.Decreasing the temperature of the surroundings
C.Increasing the thickness of the cell membrane
D.Decreasing the concentration gradient of oxygen
Download the worksheet for Movement in and out of Cells - Diffusion to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which property of a cell membrane allows it to be 'partially permeable' during osmosis?
A.It allows all solute molecules to pass but blocks water.
B.It has small pores that allow small molecules like water to pass but prevent large solute molecules from passing.
C.It is made of cellulose which provides high mechanical strength.
D.It requires ATP to move water molecules across the lipid bilayer.
- 2.
What happens to the turgor pressure of a plant cell when it is placed in a solution with a much higher water potential than the cell sap?
A.Turgor pressure decreases as water leaves the vacuole.
B.Turgor pressure remains constant as the cell wall prevents water entry.
C.Turgor pressure decreases because the cell membrane pulls away from the cell wall.
D.Turgor pressure increases as water enters the vacuole, pushing the cytoplasm against the cell wall.
- 3.
Which statement best defines the process of osmosis in a biological system?
A.The movement of solute particles from a region of high concentration to a region of low concentration.
B.The net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane.
C.The movement of water against a concentration gradient using energy from respiration.
D.The diffusion of any liquid through a fully permeable cell wall.
Download the worksheet for Movement in and out of Cells - Osmosis to practice offline. It includes additional chapter-level practice questions.
Active transport
SubtopicActive transport under Movement in and out of Cells for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
In active transport, molecules move across the cell membrane against a concentration gradient. What does 'against a concentration gradient' mean?
A.From a region of high concentration to a region of low concentration
B.In the same direction as the natural flow of particles
C.From a region of low concentration to a region of high concentration
D.The movement of water only
- 2.
Which specialized plant cell uses active transport to absorb mineral ions from the soil?
A.Palisade mesophyll cell
B.Xylem vessel element
C.Guard cell
D.Root hair cell
- 3.
Where does the energy required for active transport in animal cells primarily originate?
A.Aerobic respiration in the mitochondria
B.The breakdown of glucose in the digestive system
C.Heat energy absorbed from the environment
D.Photolysis of water in the cytoplasm
Download the worksheet for Movement in and out of Cells - Active transport to practice offline. It includes additional chapter-level practice questions.