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.
What is the principal source of energy input to biological systems?
In the carbon cycle, what is one way that carbon can enter the atmosphere?
A gardener has two groups of strawberry plants, labelled X and Y. They are grown to maturity under identical conditions. He makes some observations...
The diagram shows a section through a flower. Where does fertilisation take place?
During the menstrual cycle, hormone M is released in the body to stimulate the production of eggs. This is then followed by the release of hormone ...
What is the correct order for the sizes of the pieces of genetic material shown in the table, from smallest to largest?
Rising carbon dioxide levels in the atmosphere are causing the Earth’s climate to warm up. In what way might this change of climate affect the proc...
The gene for insulin production can be transferred from human DNA into bacterial DNA. These bacteria are cultured to produce human insulin. What is...
The diagram shows parts of the human body involved in excretion. [Figure A.B.C.D]
Grapes are fruits that grow on a plant called a grape vine. A farmer grows a variety of grape vine called the sultana. The grapes produced are sold...
Guinea pigs are small mammals. In some countries they are produced for food and in others they are bred as pets. [Figure: uterus and developing off...
Amylases are enzymes that are made in specific cells of animals and plants and also by bacteria. In humans, amylase is secreted into the alimentary...
Lions are carnivorous mammals that hunt their prey. The forelimb of a lion has the same basic structure as the arm of a human. The diagram shows th...
The diagram shows some cells from the lower part of a transpiring leaf. [Figure: leaf cells with lower epidermis, A, B, C, D and arrows 1, 2, 3]
Humans have receptors to detect stimuli in their environment and a nervous system to coordinate responses to these stimuli.
Malnutrition is a global problem. In early 2020 the world population was approximately 7.8 billion people. Of these it is estimated that 1.9 billio...
Describe the composition of human blood.
Organs in the human body produce substances which have specific functions.
The diagram shows a cross-section through a leaf when viewed using a light microscope. [Figure 2.1]
The graph shows how the concentration of lactose sugar changes during the formation of yoghurt from milk over a period of 48 hours. [Figure 3.1]
The diagram shows the internal structure of the human heart and associated blood vessels. [Figure 4.1]
A group of scientists investigated the total mass of carbon dioxide released when animals and plants are farmed and then used as food for humans.
The diagram shows a food web in an area of grassland. [Figure 6.1]
The photograph shows a fruit of the tomato plant. The fruit has been cut in half to show the structures labelled P and Q. [Figure 7.1]
Describe and explain the gas exchange that takes place between the leaf of a plant and the air in the atmosphere during a 24-hour period.
Explain the advantages and disadvantages of the use of insecticides in agriculture.
Some students were provided with some specimens of arthropods. They counted the number of legs on each arthropod. Their results are shown in the ta...
The diagram shows two plant cells, X and Y. Cell X has a higher water potential than Y. In which direction and by which process will water move bet...
Which row identifies how ions and molecules move by active transport?
A student carried out two tests on a liquid. When Benedict's solution was added to half of the liquid and heated, it turned red. When biuret reagen...
Enzymes are involved in many reactions in living cells. Which statement describes the action of enzymes?
The diagram shows the movement of substances involved in photosynthesis in a leaf. Which row shows the correct labels for the diagram?
The diagram shows a plant cell. Compared with the rest of the cell, which row describes the concentrations of oxygen and magnesium inside structure...
The diagram shows a root hair cell. How does the shape of the cell help the plant?
A student used the apparatus shown to measure the rate of water loss by the leafy stem at increasing wind speeds. Which graph was produced from the...
A deficiency disease in children causes soft and deformed bones. What is the name and cause of this deficiency disease?
The diagram shows the human digestive system. Where do egestion and ingestion occur?
The graph shows the changes in lung volume during breathing when a person was at rest and then when they began to exercise. From resting to exercis...
What are the products of anaerobic respiration in muscle?
Which label shows where lactic acid is broken down?
Which blood vessels carry deoxygenated blood?
What describes the microorganism that causes cholera and its method of transmission?
The chart gives information about a car being driven at 110 km/h by someone who has not consumed alcohol. It shows how far the car travels from the...
Drugs can be used to treat infections in the body. What are antibiotics used for?
Human immunodeficiency virus (HIV) affects the immune system resulting in decreased lymphocyte numbers. The diagnosis of AIDS can be made when lymp...
Some people require a treatment called dialysis to remove waste products and excess salts from their blood. For these individuals, which part of th...
Which change occurs in the eye as a person focuses on a vehicle approaching from a long distance?
A light was shone into a person's eye for 50 seconds. During this time, the intensity of the light was varied. The graph shows changes in the perso...
The graph shows the blood sugar level for a person over eight hours. They did not exercise during this time. Which statement explains the shape of ...
Which actions may lead to the contraction of hair erector muscles in the skin? 1 being sprayed with cold water 2 wearing a thick coat 3 entering a ...