O Level · Cambridge 5090

Biology 5090

2,064 practice questions with worked solutions, organised by topic and past-paper session. Practise any question and get your answer marked instantly.

Practise by topic

Cells Cell structure and function Specialised cells, tissues and organs Classification Concept and use of a classification system Features of organisms Movement into and out of cells Diffusion and osmosis Active transport Biological molecules Biological molecules Enzymes Enzyme action Effects of temperature and pH Plant nutrition Photosynthesis Leaf structure Mineral nutrition Transport in flowering plants Uptake and transport of water and ions Transpiration and translocation Human nutrition Diet Human digestive system Absorption and assimilation Human gas exchange Human gas exchange Respiration Respiration Aerobic respiration Anaerobic respiration Transport in humans Circulatory system Heart Blood vessels Blood Disease and immunity Disease Antibiotics Immunity Excretion Excretion Urinary system Coordination and control Mammalian nervous system Mammalian sense organs Mammalian hormones Homeostasis Temperature control Blood glucose control Coordination and response in plants Coordination and response in plants Development of organisms and continuity of life Nuclear division Asexual and sexual reproduction Sexual reproduction in plants Sexual reproduction in humans Inheritance Variation DNA Inheritance Selection Biotechnology and genetic modification Biotechnology Genetic modification Relationships of organisms with one another and with the environment Energy flow Nutrient cycles Ecosystems and biodiversity Effects of humans on ecosystems Conservation

By past paper

May/June 2016 May/June 2015

Example questions

An enzyme is used to remove the cell wall from a plant cell. What would happen if this cell were then put into distilled water?

Diffusion and osmosis · May/June 2015

Five tubes holding cooked egg-white are arranged as shown in the diagram. Protease solutions with different pH values are added to each tube. Which diagram represents the result of this experiment for a protease from the stomach?

Effects of temperature and pH · May/June 2015

In which combination of conditions will a well-watered plant transpire most rapidly?

Transpiration and translocation · May/June 2015

A plant was put into water that contained black dye. After 24 hours, the plant was taken out and slices were cut from the root and the stem. Which diagram shows the results?

Uptake and transport of water and ions · May/June 2015

The diagram shows the heart and several major blood vessels. What could the blood pressures (in kPa) be for the vessels labelled on the diagram?

Blood vessels · May/June 2015

The diagram illustrates how pressure in the aorta and the left ventricle changes over one full heartbeat. What causes the rise in pressure between points X and Y?

Heart · May/June 2015

The diagram illustrates the liver and its blood supply. What is the name of blood vessel X, and which substance becomes more concentrated between vessel W and vessel X?

Blood vessels · May/June 2015

In the equations below, the term shown in a box stands for energy or an energy-rich compound. Which equation gives the best representation of aerobic respiration?

Aerobic respiration · May/June 2015

The diagram illustrates the rib cage and some of the muscles used in breathing, viewed from the side. What occurs when the intercostal muscles shown in the diagram contract?

Human gas exchange · May/June 2015

The diagram illustrates part of an alveolus and a capillary in a lung. How do the carbon dioxide concentrations compare at X, Y and Z?

Human gas exchange · May/June 2015