AQA · GCSE · Biology

Bioenergetics

04.5 · 3 marks Tobacco mosaic virus and plant growth Explain why plants infected with tobacco mosaic virus grow slowly. 01.2 · 2 marks Energy source for photosynthesis Describe how energy for the photosynthesis reaction is gained by plants. 05.5 · 2 marks Bacterial benefits of root nodules Suggest how the nodules benefit the bacteria. 05.6 · 2 marks Plant benefits of nitrogen-fixing nodules Explain how the nodules benefit the gorse plant. 04.4 · 1 mark Air holes in a culture-bottle cap Describe why there are air holes in the cap of the culture bottle. 01.2 · 3 marks Plant growth hypothesis Explain why the students thought their hypothesis would be correct. 04.1 · 1 mark The photosynthesis symbol equation What is the symbol equation for photosynthesis? Tick one box.

AQA · GCSE · Biology

Inheritance, variation and evolution

06.1 · 1 mark Meaning of heterozygous Some people are heterozygous for a genetic disorder. Define the term ‘heterozygous’. 04.1 · 2 marks Cell division by meiosis In sexual reproduction, cells divide by meiosis to form gametes. Which two statements are true for cell division by meiosis?... 01.7 · 2 marks Snail variation across future generations A change in DNA has caused snail P to be very different from the other five snails. Suggest why there might be an increasing... 05.3 · 4 marks Punnett square inheritance probability A man and a woman do not have CF. The man and the woman have a child who has CF. Draw a Punnett square diagram to find the... 04.3 · 4 marks Evolution of flower colour in orchids One present day species has bright purple flowers. Describe how an orchid with bright purple flowers may have evolved from the...

AQA · GCSE · Biology

Infection and response

04.2 · 4 marks Vaccine protection against gonorrhoea Gonorrhoea is a bacterial disease. A new vaccine is being developed against gonorrhoea. Describe how a vaccine would work to... 07.3 · 6 marks Designing clinical trials for a treatment Describe how the clinical trials should be carried out. 03.1 · 1 mark The microorganism causing measles What type of microorganism causes measles? 03.3 · 4 marks Measles vaccine immunity Describe how the measles vaccine helps a person to become immune to the measles pathogen.

AQA · GCSE · Biology

Paper 1

01.3 · 2 marks Calculating a mean from measurements Calculate mean value X. 01.5 · 1 mark Possible causes of anomalous results Suggest one possible cause of the anomalous result. 01.6 · 1 mark Handling an anomalous result How did the students deal with the anomalous result? 01.7 · 1 mark Control variables in a photosynthesis investigation Give one factor the students should have kept constant in this investigation.

AQA · GCSE · Biology

Cell biology

02.1 · 2 marks Meaning of the term diffusion What is meant by the term diffusion? 06.1 · 1 mark Location of plant stem cells Give one place in a plant where stem cells are found.

AQA · GCSE · Biology

Organisation

01.2 · 3 marks Testing a drink for sugar Describe how a student could test the drink for sugar. Give the colour of a positive result. 01.3 · 2 marks Testing a drink for protein Describe how a student could test the drink for protein. Give the colour of a positive result.