Cambridge & Pearson Edexcel Past Paper Questions
Browse 35,704 questions from Cambridge O-Level & A-Level and Pearson Edexcel IGCSE & IAL exams. Click any question to practice.
Describe the similarities and differences in structure and function of root hairs and villi.
Explain how meiosis is involved in the formation of gametes.
Describe the path taken by a molecule of carbon dioxide, and the processes in which it is involved, from the moment it leaves the atmosphere until ...
Fig. 1.1 shows a kidney and its associated structures. The arrows show the direction of flow of fluids in these structures. [Figure 1.1]
Fig. 2.1 shows parts of the alimentary canal that lie in the upper part of the human body. [Figure 2.1]
Pitcher plants, similar to the one shown in Fig. 3.1, trap insects in their pitchers and digest them to supplement their nutritional requirements. ...
Fig. 4.1 is an incomplete flow chart of the process of anaerobic respiration in yeast and in muscles. [Figure 4.1]
There are many different drugs available to treat high blood pressure. Fig. 5.1 shows the mean heart rates of two groups of people, J and K, over a...
Describe the differences between an ovule, a seed and a fruit.
Explain what is meant by the term reflex action.
Give an example of a food chain involving four named organisms.
Explain what is meant by the term double circulation.
What describes the diffusion of molecules?
The diagram shows the concentration of magnesium ions in a healthy root hair cell of a plant and in the soil water surrounding it. For the plant to...
What is the enzyme that controls a reaction in which both the enzyme and the substrate can denature at high temperatures?
Which part of a leaf contains cells, but with the fewest chloroplasts?
Which features of the mesophyll layer in a leaf aid rapid diffusion of carbon dioxide into the cells?
Which digestive processes take place in the mouth (buccal) cavity?
What would be least likely to cause famine?
The health of a population's teeth can be measured by finding the average number of decayed, missing or filled teeth per person. This is called the...
The diagram shows cross-sections through the root and stem of the same plant. What is tissue T?
Which organ receives blood from two major vessels and all of this blood leaves it in a single major vessel?
What is the composition of expired air?
What happens when we breathe out with force?
Which changes occur as a person exercises?
A person drinks a large amount of water. How does this affect the water potentials of the liquids in the renal arteries, the renal veins and the ur...
What are the responses to decreased body temperature?
What are the symptoms of diabetes?
Which row correctly describes the connections of the neurones in a reflex action?
What does the hypothalamus control?
The diagram shows the main muscles and bones of the arm. What happens when muscle X contracts?
The graph shows the relative risk of lung cancer, according to the years of smoking and the number of cigarettes smoked each day. The following sta...
An ocean is polluted by an oil spill. What is least likely to speed up the rate of decomposition of oil by microorganisms?
The diagram shows a food chain. mahogany tree → caterpillar → songbird → hawk Which type of organism is present in the largest numbers in this food...
The diagram shows changes in the appearance of a leaf over a period of time, as it lies on the damp ground. Which type of organism is most likely t...
The diagram shows some stages in the nitrogen cycle. Which arrow represents the action of nitrogen-fixing bacteria?
Which method of malarial control is effective against both adult and larval forms of the mosquito?
Which graph shows changes that occur in a river after being polluted by sewage?
The diagram shows peas growing on the plant. What are the labelled structures?
The diagram shows a developing fetus in the uterus. What is the function of X?
Some signs of syphilis are listed. 1 fever 2 loss of appetite 3 non healing skin ulcers 4 skin rash 5 small, painless sores 6 swelling of lymph nod...
In horses, red hair is dominant to brown. A breeder crosses a number of heterozygous red-haired horses. Approximately what percentage of the offspr...
Which row in the table is correct?
Which statement is correct?
Which diagram shows the positions of the chloroplasts and the nucleus in a cell?
How do plants absorb nitrate ions by active transport?
The diagram shows the net movement of water by osmosis between four adjacent cells. Which cell has the highest water potential?
The diagram represents an enzyme and four molecules, A, B, C and D. Which molecule is the substrate of this enzyme?
The diagram shows the upper layers of a leaf. What are the structures labelled X and Y?
A variegated plant is destarched and then placed in the sunlight for several hours. A leaf is then taken and tested for starch using iodine solutio...