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Try this quiz based on GCSE Biology past papers. Choose the topic you would like to revise and answer the questions.

CCEA GCSE foundation and higher triple science exam practice with Bitesize interactive quizzes covering feedback and common errors in cells, organisation and more.

Foundation and higher exam quiz based on CCEA GCSE biology past papers to boost your revision in photosynthesis, respiration, plant disease and more.

This interactive quiz is suitable for GCSE Biology (single science) students studying treating and preventing diseases - through the provision of vaccinations and antibiotics.

This interactive quiz is suitable for GCSE Biology (single science) students studying bacterial growth and how medicines have been developed to fight illness.

This interactive quiz is suitable for GCSE Biology (single science) students studying decomposition and the rate of decay under various circumstances.

To examine cells and learn more about their structure, we need to be able to see them in very fine detail.

Plants and animals consist of different types of cell that work together. Animal and plant cells have certain structures in common. Many cells are specialised and are adapted for their function.

Diffusion is the random movement of a substance from a region of high concentration to a region of low concentration.

Green plants absorb light in their leaves and convert it to energy by photosynthesis.

Food provides energy and nutrients. The different components of our diet have different sources and functions.

Enzymes are proteins that act as biological catalysts, meaning they speed up reactions without being used up.

The human respiratory system is adapted to allow air to pass in and out of the body, and for efficient gas exchange to happen.

The brain and spinal cord form the central nervous system (CNS). The CNS controls and coordinates responses between receptors and effectors.

Learn about hormones and their effect on our body.

The distribution of organisms in a habitat may be affected by physical factors, such as temperature and light.

The Sun is the original source of energy for almost all organisms on the Earth. The way energy passes through an ecosystem is described as energy flow.

Within an ecosystem, nutrients (such as carbon or nitrogen) are continually recycled.

There is increasing evidence that the level of carbon dioxide in the Earth’s atmosphere is rising. There is also evidence that humans are responsible for this rise.

Nitrogen gas makes up 78% of Earth’s atmosphere and is an essential component in amino acids and proteins.

Osmosis is the diffusion of water molecules from a dilute solution (high concentration of water) to a more concentrated solution (low concentration of water) across a selectively permeable membrane.

Blood is pumped away from the heart at high pressure in arteries, and returns to the heart at low pressure in veins. The human circulatory system is a double circulatory system.

Most animals carry out sexual reproduction. Sexual reproduction involves the joining of two sex cells (gametes) – the sperm (male gamete) and the egg/ovum (female gamete).

Chromosomes are made from DNA. Genes are short sections of DNA. DNA carries genetic code that determines characteristics of a living organism.

Mitosis makes identical cells, meiosis makes gametes.

Genetic diagrams show how characteristics are inherited. Alleles can be recessive, dominant or codominant genes.

Sex is controlled in humans by the X and Y chromosomes. Genetic screening involves testing people or groups of people for the presence of a particular allele or other genetic abnormality.

Genetic engineering is a process that modifies the genome of an organism to introduce desirable characteristics.

Organisms of the same species vary in many ways. There are two types of variation – continuous and discontinuous. Natural selection explains how evolution occurs.

A communicable disease (usually caused by a microorganism such as bacteria, virus or fungus) can be passed from one organism to another.

Aseptic techniques are used when working with bacteria and fungi.

The body has adapted defence mechanisms to protect itself against the entry of microorganisms.

A non-communicable disease is not passed from one organism to another. They are not infectious.

Before planning an investigation you need to identify the variables.

It is essential to learn the relevant practical skills in order to carry out experiments.

Find out how you can analyse, interpret and critically evaluate a range of experimental data.

A conclusion is a judgement reached at the end of an investigation using data and/or observations gathered.