AQA · GCSE · Biology

Bioenergetics

04.2 · 3 marks Temperature and photosynthesis rate Describe the effect of increasing temperature on the rate of photosynthesis. Use data from Table 2. 04.3 · 2 marks Photosynthesis at very high temperature Explain why no gas was produced by the plant at 45 °C. 04.4 · 1 mark Improving gas-volume measurement accuracy How could the student increase the accuracy of the results? Tick one box. 04.5 · 2 marks Greenhouse heating trade-offs The mean temperature of the greenhouse is 15 °C. A heater would keep the temperature of the greenhouse at 25 °C. Suggest two...

AQA · GCSE · Biology

Cell biology

05.2 · 3 marks Prokaryotic and eukaryotic cell differences Give three ways that a prokaryotic cell is different from a eukaryotic cell. 02.1 · 1 mark Variables in an osmosis investigation What was the independent variable for the investigation? Tick one box. 02.2 · 1 mark Reliable tube mass measurements The student dried the outside of each tube with a paper towel before recording the mass. Why was it important to dry the tubes? 02.3 · 3 marks Calculating percentage mass change Calculate value X in Table 1. Give your answer to 1 decimal place. 02.4 · 3 marks Plotting osmosis investigation results Complete Figure 2. Plot the percentage change in mass from Table 1 for salt concentrations of only 0.2 mol/dm³ to 1.0 mol/dm³... 02.5 · 1 mark Finding the isotonic concentration Determine the concentration of salt in solution Z. Use Figure 2. 05.1 · 1 mark Identifying a microscope from an image What type of microscope was used to view the bacteria in Figure 3? Give a reason for your answer. 05.3 · 5 marks Cell size and magnification Calculate the magnification of the cell shown in Figure 4. 06.1 · 4 marks The cell cycle in sequence Describe the process of the cell cycle shown in Figure 5. 04.6 · 1 mark Root growth from stem cuttings Which tissue in the cut stem will differentiate into new root cells? Tick one box.

AQA · GCSE · Biology

Organisation

01.1 · 2 marks Choosing fructose for a drink Suggest two reasons why the drinks company uses fructose in the drink rather than using glucose. Do not refer to sweetness in... 01.4 · 6 marks Protein and fat digestion Describe how protein and fat are digested. You should include the enzymes involved and where the enzymes are produced. 06.2 · 3 marks Features of a malignant tumour Lung cancer is malignant. Explain what is meant by a malignant tumour. 06.3 · 4 marks Smoking damage and gas exchange Person A and person B do the same exercise. Explain why person B breathes much faster than person A during the exercise. 07.1 · 6 marks Angina causes symptoms and GTN Explain the causes and symptoms of angina and how GTN reduces the symptoms of angina.

AQA · GCSE · Biology

Infection and response

03.2 · 2 marks Reducing the spread of measles Suggest two ways the spread of measles can be reduced. Do not refer to vaccination in your answer. 03.5 · 3 marks Purposes of clinical drug trials Give three reasons why clinical trials are needed.

AQA · GCSE · Biology

Inheritance, variation and evolution

02.1 · 1 mark Biological classification hierarchy What type of classification group is eukaryota? Tick one box. 03.3 · 5 marks AKU genetic cross probability A female who has AKU and a male who is heterozygous for AKU plan to have a child. Determine the probability that the child will...

AQA · GCSE · Biology

Homeostasis and response

03.5 · 4 marks In vitro fertilisation process Some people have In Vitro Fertilisation (IVF) treatment to increase the chance of becoming pregnant. Describe how the process of...