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.
A root hair cell in a plant is respiring aerobically.
The number of individuals in a population can vary with time. Table 8.1 shows how the global populations of humans and tigers are estimated to have...
Cholera is caused by a type of organism that can be passed from one host to another. The disease-causing organism that causes cholera is a bacteriu...
Fig. 2.1 shows a reindeer. [Figure 2.1] Reindeer live in areas of the Arctic where there are no trees. In some months of the year reindeer eat most...
Fig. 3.1 shows diagrams that represent the blood flow into and out of three major organs through blood vessels P to U. P lungs Q R kidneys S T live...
Fig. 4.1 shows a Siamese fighting fish that lives in fresh water. large colourful fin location of an organ that can be filled with atmospheric air ...
A student investigates the use of an enzyme in fruit juice production. The student carries out the following steps: • cuts one apple into small pie...
Fig. 6.1 is a cross-section of a plant leaf. J K L [Figure 6.1]
Mangrove trees grow in forests that form an important coastal ecosystem. Mangrove forests have a high biodiversity, with many different animal spec...
The wobbegong, or carpet shark, is a type of shark that spends its time resting on the sea floor. There are twelve different species of wobbegong. ...
The bacterium Vibrio cholerae that causes the disease cholera acts on the cells of the intestinal wall. It causes chloride ions to move out of the ...
Which movement of a substance in a plant requires the plant to provide energy?
Which statements are correct? 1 A molecule of DNA consists of many nucleotides. 2 A molecule of glycogen consists of many glucose molecules. 3 A mo...
Some students investigated the effect of temperature on the digestion of starch to form maltose. They added equal volumes of amylase and starch sol...
The diagram shows a section through a dicotyledonous leaf. Which cell cannot photosynthesise? [Diagram]
A leafy stem was cut from a plant and placed in a red dye solution for 18 hours. The diagram shows a transverse section of the stem after 18 hours....
The diagram shows the movement of water through part of a leaf. Which processes are involved in the movement of water at these stages? [Diagram and...
The diagram shows part of the human digestive system. Which parts produce bile and store bile? [Diagram]
Five test-tubes containing cooked egg white are set up as shown. Cooked egg white contains a protein. Protease solutions of different pH are added ...
Which diagram shows the absorption of different food molecules into a villus? [Diagrams A, B, C, D]
The table shows the changes that occur in the thorax during breathing. Which changes occur during inspiration? [Table]
Scientists have concluded that absorption of mineral ions in plants requires energy from respiration. Which observation best supports this conclusion?
When people travel in an aircraft and sit still in their seats for long periods of time, their lower legs may swell up. Which statement explains wh...
The diagram shows a blood cell as seen under a light microscope. What is the type of blood cell shown? [Diagram]
Which statements about mosquitoes are correct? [Table]
The spread of HIV was reduced in many countries between 1990 and 2010. Which action assisted this reduction?
Which statement about the immune system is correct?
For which disease can antibiotics be used as an effective treatment?
The diagram shows part of the human urinary system. What are structures X, Y and Z? [Diagram and Table]
Nerve impulses in neurones can travel: 1 away from the central nervous system 2 towards the central nervous system 3 within the central nervous sys...
The diameter of the pupil of the eye was measured at a range of different light intensities. What is the percentage decrease in pupil diameter (rou...
When a person is frightened, which substance causes an increase in the blood sugar level?
Raynaud's syndrome is a condition that can be triggered by stress. It causes the hands and feet to react as if they were affected by extreme cold. ...
Which flow diagram describes how auxin affects growth in negative gravitropism? [Flow Diagrams A, B, C, D]
The diagram shows some stages during the asexual reproduction of a single-celled organism. Which row shows the relative amounts of DNA in each of t...
Asexual reproduction involves the cell cycle in which the cell divides and then growth and DNA synthesis take place before the cell is ready to div...
Which diagram matches each type of flower with its features? [Diagrams A, B, C, D]
What is the sequence of organs that a sperm cell must pass through so it can fertilise an egg cell?
The diagram shows the changes in the thickness of the uterus lining of a woman during her menstrual cycle. At which time is the woman most likely t...
Night-blindness is an inherited condition in which people have unusually poor vision when light levels are low. The diagram shows the inheritance o...
What is essential for natural selection to occur? [Table]
The gene for human insulin production can be inserted into bacterial DNA to enable the industrial production of insulin. What is an advantage of us...
Which row identifies the organisms in a food chain? [Table]
Some students set up an experiment to study the decay of leaves in garden soil. They put leaves in bags of different mesh sizes, sealed them and th...
Populations of animals are affected by disease, numbers of predators and the supply of food. Which row would lead to the most growth in population ...
Which human activity has caused most damage to tropical rainforests?
What is a function of a plant cell wall?
The international system for naming organisms is the binomial system. Which two parts form the scientific name?
A student draws six different arthropods found in woodland. [Figure 3.1] When constructing a dichotomous key, which question could be used to separ...
Contact lenses are placed on the surface of the eye to correct problems with vision. One type of contact lens is partially permeable and is normall...