Free GCSE Biology Practice Test

Ten core GCSE biology questions on cells, photosynthesis, enzymes and the body, each with a one-line explanation.

💬 Book a Free Intro Session See Pricing
1. Where in a plant cell does photosynthesis take place?

Answer: Chloroplasts contain chlorophyll, which absorbs the light energy needed for photosynthesis.

2. Where does most aerobic respiration happen in a cell?

Answer: Aerobic respiration releases energy in the mitochondria.

3. Which word equation shows photosynthesis?

Answer: Plants use light to turn carbon dioxide + water → glucose + oxygen. The reverse is respiration.

4. Which part of an animal cell contains its genetic material?

Answer: The nucleus holds the DNA.

5. Enzymes are made of …

Answer: Enzymes are proteins, which is why high temperatures can denature them.

6. Which blood cells help fight infection?

Answer: White blood cells engulf pathogens and make antibodies.

7. What is the main job of red blood cells?

Answer: Red blood cells contain haemoglobin to carry oxygen.

8. What shape is a DNA molecule?

Answer: DNA is two strands twisted into a double helix.

9. Diffusion is the movement of particles …

Answer: Diffusion is the net movement of particles from high to low concentration, with no energy needed.

10. Which organ produces insulin?

Answer: The pancreas releases insulin to lower blood glucose.

About this test

GCSE biology rewards precise vocabulary: examiners look for the right keyword, such as mitochondria rather than energy. These questions check the core facts that later, longer answers are built on.

Want a tutor to work on these topics with your child every week? See our GCSE science tutoring or plans from £60 a month.

More GCSE Science practice tests

Free GCSE Chemistry Practice TestAtoms, the periodic table, bonding and acids. Free GCSE Physics Practice TestForces, energy, electricity and waves.

See all 37 free practice tests