The questions cut across all the core Biology topics which include the following:

Characteristics and classification of living organisms
Organisation of the organism
Movement in and out of cells
Biological molecules
Enzymes

Plant nutrition
Human nutrition
Transport in plants
Transport in animals

Diseases and immunity
Gas exchange in humans
Respiration
Excretion in humans
Coordination and response
Drugs
Reproduction

Inheritance
Variation and selection
Organisms and their environment
Biotechnology and genetic engineering
Human influences on ecosystems