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Edexcel A-Level Biology AS 2.5 Membrane Transport Mechanisms Questions

Identify the gradient, membrane protein, ATP requirement or vesicle involved in each transport mechanism, then apply the distinctions to ions, glucose, lipids and larger materials.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Distinguish diffusion, facilitated diffusion, osmosis and active transport by gradient direction, ATP and membrane proteins.
  • Explain channel, carrier and vesicle roles in moving ions, polar solutes and larger materials across membranes.
  • Apply transport mechanisms to biological contexts and data, including endocytosis, exocytosis and uptake investigations.

Edexcel A-Level Biology AS 2.5 Membrane Transport Mechanisms Questions question 1

[Maximum number: 1]

The structure and properties of a cell membrane determine which molecules can pass through the membrane.

The diagram shows some structures in part of a cell membrane.

Figure for Question Edexcel A-Level Biology AS 2.5 Membrane Transport Mechanisms Questions question 1 — Edexcel A-Level Biology AS

Which structure allows ions to diffuse through the membrane?

A

P

B

S

C

T

D

U

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