Biology study guides

An O-Level Biology (SEAB 6093) module overview of biological molecules and enzymes. The elements and building blocks of carbohydrates, fats and proteins, how enzymes act as biological catalysts through the lock and key model, the effect of temperature and pH on reaction rate, and the standard food tests, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of cell structure and organisation. The main organelles of plant and animal cells and their functions, how plant and animal cells compare, how to use a light microscope and calculate magnification, and the levels of organisation from cell to organism, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of ecology and environment. Ecosystems and feeding relationships in food chains and webs, the flow of energy and the role of decomposers, the carbon cycle, and the human impact of pollution and deforestation, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of homeostasis and coordination. The definition of homeostasis and the control of blood glucose by insulin and glucagon, the nervous system and the reflex arc, hormonal coordination and how it compares with nervous control, and excretion and the kidney, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of the movement of substances. Diffusion, osmosis and active transport defined and compared, the factors that change the rate of each, the effects of osmosis on plant and animal cells, and how surface area to volume ratio controls exchange, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of nutrition. Photosynthesis and the word equation, how the leaf is adapted to make food, the human digestive system and mechanical and chemical digestion, and how the small intestine absorbs and the body assimilates digested food, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of reproduction and inheritance. Chromosomes, genes and DNA and the roles of mitosis and meiosis, sexual reproduction in humans and flowering plants, and monohybrid inheritance with genetic diagrams and variation, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of respiration and gas exchange. Aerobic and anaerobic respiration with their word equations and energy yields, the human gas exchange system and how alveoli are adapted, the mechanism of breathing, and the effects of exercise and smoking, with links to every dot point.

An O-Level Biology (SEAB 6093) module overview of transport in organisms. The components of blood and their functions, the structure of the heart and the three blood vessels, the double circulatory system, and transport in plants by xylem and phloem with transpiration, with links to every dot point.