4-mark practice questions — OCR GCSE Biology A: Gateway Science (J247)
83 questions · biology · View as Markdown
How to answer
4-mark questions are the shortest levels-of-response band. Aim for four scientific ideas, each in its own short sentence.
Sample questions
- A yeast cell is a eukaryotic cell. Explain why a yeast cell contains mitochondria but does not contain chloroplasts.
- A cat breeder notices that some cats in a litter have short fur and some have long fur. Short fur is controlled by a dom…
- A population of giraffes lives in a grassland habitat where food at ground level becomes increasingly scarce. Some giraf…
- A plant can produce either red flowers or white flowers. Red flower colour is controlled by a dominant allele (R). White…
- A bacterial cell is a prokaryotic cell. Explain why bacterial cells do not have mitochondria yet are still able to carry…
- A person has not drunk any water for several hours and their blood water concentration has dropped below the normal leve…
- A farmer breeds guinea pigs. Some guinea pigs have smooth coat and some have rough coat. The allele for rough coat (R) i…
- Explain how the endocrine system responds when blood glucose concentration falls below the optimum level.