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CAIE A-Level Biology 7.2 Transport Mechanisms Question Bank

Practise plant-transport mechanism questions by tracing root water pathways, explaining transpiration pull and modelling phloem loading and mass flow.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • trace water through apoplast, symplast, endodermis, Casparian strip and xylem
  • explain transpiration pull using evaporation, diffusion, cohesion, tension and adhesion
  • model phloem loading and mass flow from source-to-sink water potential changes

Covered syllabus points

7.2.1—Solutes transported in water7.2.2—Water transport from soil to xylem7.2.3—Transpiration from leaves7.2.4—Hydrogen bonding in water movement7.2.5—Xerophytic adaptations7.2.6—Assimilate transport in phloem7.2.7—Companion cells transfer assimilates7.2.8—Mass flow in phloem

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