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Edexcel A-Level Biology AS 2.5 Membrane Transport Mechanisms Questions

Name the transported substance and direction relative to its gradient, then state whether a channel, carrier, ATP or vesicle is required and explain why.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Distinguish passive and active transport through gradient direction and ATP use.
  • Explain why polar solutes or ions require channel or carrier proteins.
  • Identify endocytosis or exocytosis when membranes transport large material.

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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