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.
Electronic cigarettes are a cigarette substitute allowing nicotine to be inhaled without the other components found in cigarette smoke. Which effec...
The diagram shows the structure of a bacterium. [Figure 26.1] In what way does this differ from a cell of a fungus?
Which microorganisms are involved in the decomposition of dead plant material? bacteria fungi viruses
What is the reason for describing the flow of energy through an ecosystem as non-cyclic?
The diagram shows a complete food web. [Figure 29.1] Which row identifies examples of the types of organisms in this food web?
The diagram shows part of the carbon cycle. [Figure 30.1] What do X, Y and Z represent?
Coastal marine regions are environments with a rich plant and animal diversity. Which process would reduce the biodiversity of these environments?
Hardwood trees in tropical rainforests are often harvested for timber. A single quick-growing crop, such as palm oil, is then grown on the same lan...
The diagram shows part of a Bryophyllum plant. [Figure 33.1] Which best describes how the new plants are produced? type of reproduction asexual rep...
The table shows four ways in which diseases may be passed from one human to another. Which row shows the ways in which HIV may be transferred? tran...
Which sex chromosomes are present in every sperm cell?
Earlobes can either be attached to the cheek or be 'free' (unattached). This characteristic is controlled by a single gene. The allele for attached...
Which statements about natural selection are correct? natural selection can lead to better adapted species surviving natural selection can lead to ...
Some stages in the production of human insulin are listed. 1 Genetically modified E. coli bacteria are grown in large fermenters. 2 The gene for hu...
The diagram shows a root hair cell from a lemon tree and some soil particles. root hair cell. air spaces soil particle
A person visits an eye doctor to have an eye test. On the wall of the doctor's room is a diagram of an eye. X layer Y choroid layer contains melani...
A sycamore tree is a producer for many food chains in a forest ecosystem.
The diagram shows part of the human alimentary canal and its associated organs. F H
A farmer is using a tool, called a mattock, to weed her crop. right arm
Yoghurt is a milk product.
Excess amino acids are broken down in liver cells to form molecules of urea.
Rice, maize and wheat plants are the main carbohydrate source for more than 60% of the human population.
Describe how air is breathed in, using the rib cage and diaphragm, so that it reaches the alveoli.
The diagram shows the teeth in the lower jaw of a human. [Figure 1.1]
The diagram shows the arrangement of major blood vessels in the human circulatory system. Arrows show the direction that blood moves in each vessel...
The diagram shows an elm tree. [Figure 3.1]
Cardiopulmonary resuscitation (CPR) is a first aid procedure. Air is forced into a patient's lungs by another person. The heart is made to pump blo...
The diagram shows villi in the small intestine. [Figure 5.1]
The diagram shows the human life cycle. The components of the diagram are not drawn to the same scale. The diagram shows: cells L, M and N two type...
The diagram shows structures involved in a reflex action that results in removal of a person's hand from a sharp object. [Figure 7.1]
State the functions of the human liver and explain the importance to a person of each function.
Describe the large-scale production of a named antibiotic and explain the importance of each stage of the process.
The diagram shows a plant cell. The cell is stained with iodine solution. [Figure 1.1] After staining with iodine solution, what are the colours of...
The diagram shows the shape of a red blood cell. [Figure 2.1] What is an advantage of this shape?
The diagrams show four different plant cells. They are all carrying out aerobic respiration. Which diagram represents the movement of carbon dioxid...
The rate of nitrate ion absorption by a root hair cell was measured at different soil nitrate concentrations. At X, the concentration of nitrate in...
The graph shows how the rate of reaction of a protease from the stomach varies with pH. [Figure 5.1] What describes the pH at point X?
A dilute starch solution turns blue when very dilute iodine solution is added. This colour disappears as the starch is broken down by amylase. The ...
A gardener grows tomato plants in pots. To begin with, the plants produce green leaves and grow quickly. Then, after a few weeks, the leaves turn y...
Which row shows the diseases caused by lack of different nutrients in the diet?
Four food tests were each carried out on four different white powders, A, B, C and D. The results are shown in the table. Which powder contains a c...
Four plant shoots were set up as shown in the diagram, in the same environmental conditions. Waterproof petroleum jelly was applied to the plant le...
Which blood vessels carry blood towards the heart and towards the lungs?
The diagram shows the right side of the human heart when the ventricle is relaxed. [Figure 15.1] Which row describes the positions of valve X and v...
People who have a diet that contains a lot of fat and who smoke have two important risk factors for which disease?
Which equation represents aerobic respiration in plant cells?
Four flasks are sterilised and set up as shown. Which flask will show signs of fermentation (anaerobic respiration) after one hour? [Figure 18.1]
Which row shows actions that occur when humans breathe in?
Which graph shows the change in concentration of molecules in the dialysis fluid during kidney dialysis? [Figure 20.1]
The diagram shows some structures in human skin. [Figure 21.1] Which row shows the names of structures X, Y and Z?