Combined Science (B) J260,01 Foundation June 2019, OCR GCSE Past Papers with Mark Schemes

1. Ecosystems and Food Chains – North Sea food web interactions, biomass transfer, photosynthesis equation, and sustainability in herring fishing.

2. Cell Biology and Microscopy – Identifying mitosis in chicken embryo cells, effects of magnification, purpose of methylene blue staining, and gas exchange in eggs.

3. Genetics and Inheritance – Sickle cell disease inheritance, Punnett square analysis, red blood cell adaptations, and stem cell applications in medical treatments.

4. Circulatory System and Respiration – Heartbeat sequence, pulse rate investigation, oxygen transport, and effects of exercise on recovery rate.

5. Evolution and Natural Selection – Evolutionary relationships between vertebrates, speciation in horses and donkeys, and fossil evidence for common ancestors.

6. Disease and Immunity – Flu virus transmission, vaccination benefits, annual flu vaccine updates, electron microscopy advantages, and correlation between flu and pneumonia.