Exam-style Biology practice, by topic.

The seven life processes and how living things are classified.

Animal and plant cells, specialised cells, and how organisms are organised.

How substances move into and out of cells — the classic exam banker.

Carbohydrates, proteins and fats — their structure, tests and roles.

How enzymes work, and how temperature and pH change their activity.

The photosynthesis equation, limiting factors and leaf structure.

Diet, the digestive system, and how food is broken down and absorbed.

The heart, circulation and blood — structure linked to function.

The lungs, breathing and the features of a good gas-exchange surface.

Aerobic and anaerobic respiration, and the word equations examiners want.

The nervous system, reflexes, hormones and homeostasis.

Asexual and sexual reproduction, flowers, and reproduction in humans.

Chromosomes, alleles, Punnett squares and monohybrid crosses.

Continuous and discontinuous variation, adaptation and natural selection.

Food chains and webs, energy flow, and the carbon and nitrogen cycles.