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CAIE A-Level Biology 14.1.9 Glucagon Cell Signalling

Practise tracing glucagon receptor binding through G protein, adenylyl cyclase, cAMP and protein kinase to an amplified enzyme cascade for glycogen breakdown.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • bind glucagon to its membrane receptor and activate the associated G protein
  • activate adenylyl cyclase to convert ATP into the second messenger cAMP
  • trace protein-kinase amplification to glycogen breakdown and glucose release

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