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Course: Edexcel A Level Biology A (SNAB) 9BI0
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Edexcel A Level Biology A (SNAB) 9BI0

Topic 1 · Lifestyle, Health and Risk

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Topic 2 · Genes and Health

0/76

Topic 3 · Voice of the Genome

0/55

Topic 4 · Biodiversity and Natural Resources

0/51

Topic 5 · On the Wild Side

0/72

Topic 6 · Immunity, Infection and Forensics

0/41

Topic 7 · Run for your Life

0/55

Topic 8 · Grey Matter

0/51
Quiz

2.1.6 Diffusion and Facilitated Diffusion – Exam questions

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  • Questions count: 13
  • Passing grade: B+
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1.
Facilitated diffusion differs from simple diffusion because it
moves substances against their gradient
uses membrane proteins but no ATP
only moves lipids
requires ATP
2.
This structure is involved in facilitated diffusion.
SAT Biology - Question 202
A
B
C
D
E
3.
According to the comparison table in this lesson, what is the Gradient of Facilitated diffusion?
According to the comparison table in this lesson, what is the Gradient of Facilitated diffusion?
Membrane transport mechanisms
Up
Down (water)
Down
Up for one solute
4.
Which key term matches this description: "Channel for water."
Which key term matches this description: "Channel for water."
Gated channel
Aquaporin
Channel protein
Saturation
5.
According to the comparison table in this lesson, what is the Channel protein of Example?
According to the comparison table in this lesson, what is the Channel protein of Example?
Channels vs carriers
Rarely
Pore
Very fast
Aquaporins, K⁺ channels
6.
Which step comes first in the sequence covered in this lesson?
Which step comes first in the sequence covered in this lesson?
Shape change
Released other side
Solute binds carrier
Carrier returns
7.
According to the comparison table in this lesson, what is the Carrier protein of Example?
According to the comparison table in this lesson, what is the Carrier protein of Example?
Channels vs carriers
Shape change
GLUT glucose carriers
Binding site
Slower
8.
Which statement best describes Channel protein?
Which statement best describes Channel protein?
Hydrophilic pore; fast, specific.
Passive movement through transport proteins.
Channel for water.
Rate levels off when all carriers are in use.
9.
Which statement best describes Aquaporin?
Which statement best describes Aquaporin?
Binds solute and changes shape.
Channel for water.
Rate levels off when all carriers are in use.
Opens in response to a signal (voltage, ligand).
10.
Which statement best describes Facilitated diffusion?
Movement down the concentration gradient — no ATP.
Pumps 3 Na⁺ out and 2 K⁺ in per ATP — against both gradients.
Solution more concentrated than the cell — water leaves.
Passive movement through a protein — still no ATP.
11.
Which feature distinguishes active transport from facilitated diffusion?
It uses membrane proteins
It moves substances against a concentration gradient
It moves only water
It needs no energy
12.
IGCSE Biology 3.3 Active Transport - Question 6
IGCSE Biology 3.3 Active Transport - Question 6
A
B
C
D
13.
Complete the statement: Water moves through ______.
Complete the statement: Water moves through ______.
Saturation
saturated
Facilitated diffusion
aquaporins
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Part of Topic 2 · Genes and Health — see every lesson and quiz in this unit.
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