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.
The carbon cycle is fundamental to all ecosystems. Carbon is continuously cycled between living organisms and the atmosphere, as shown in Fig. 7.1....
Table 1.1 lists three of the gases present in the atmosphere. Table 1.1 | gas | percentage | | :------------- | :--------- | | oxygen ...
Describe physical digestion in humans and explain its importance.
The nervous system coordinates and regulates body functions. Fig. 3.1 shows two diagrams, each showing parts of the nervous system in a human. [Fi...
Lake Washington in the United States of America is a large fresh water lake. Between 1941 and 1963 an increasing amount of untreated sewage pollute...
Fig. 5.1 is a photomicrograph of the centre of a plant root. [Figure 5.1]
Fig. 6.1 shows the pattern of results from an investigation into the effect of increasing light intensity on the rate of photosynthesis. [Figure 6.1]
DNA carries genetic information in the form of genes.
The diagram shows some of the structures in a plant cell. [Figure 1.1] Which labelled parts show a sap vacuole, a nucleus and a chloroplast?
A new organism is discovered. It contains DNA in a cellular structure. To which group of organisms could it belong and to which group could it not ...
When animal cells and plant cells are placed in distilled water, the animal cells burst but the plant cells do not. Which statement explains this d...
The diagram shows the concentration of magnesium ions in a root hair cell of a healthy plant and in the soil water surrounding the root hair cell. ...
The key shows shapes representing small food molecules. [Figure 5.1 (key)] Large food molecules are made from smaller food molecules. Which diagram...
Enzymes are biological catalysts. Which type of molecule can be an enzyme?
The graphs show factors affecting the rate of photosynthesis. [Figure 7.1] At which points on the graphs could the rate of photosynthesis be limite...
The diagram shows a section through a leaf. [Figure 8.1] What are the functions of the parts labelled 1, 2, 3 and 4?
Which pathway is taken by water and mineral ions through a plant?
A student investigated the rate of transpiration in a green plant. The plant was growing in soil in a pot. The student watered the plant and then p...
The diagram shows what happens to amino acids in part of the human body. [Figure 11.1] What describes processes P and Q?
A healthy person eats a meal containing carbohydrates. Two hours later, which structure will contain a liquid with an increased concentration of gl...
Which cells in the gas exchange system produce mucus?
Which equation represents anaerobic respiration in humans?
The heart acts as a pump, pushing blood through the circulatory system. The arrows on the diagram of the heart indicate the direction in which bloo...
A person's cuts and grazes do not heal and their blood does not clot easily. What may be the cause of these symptoms?
How is the malarial parasite transmitted to humans?
Some fatal diseases are associated with smoking tobacco. In 1990, the government of a country began a campaign to persuade people to stop smoking. ...
Which diseases can be treated effectively with antibiotics? 1 HIV 2 malaria 3 cholera
In 2022, many countries required travellers to be fully vaccinated against the COVID-19 virus. New Zealand's requirements stated: 'You need to have...
Which row identifies the contents of urine in a healthy person?
Which statement describes the roles of components of the nervous system?
The diagram shows a section through the eye. [Figure 24.1] In the pupil reflex, which row gives the sites of the effectors and receptors involved?
The graph shows changes in the body temperature of a person over a 60-hour period. [Figure 25.1] Which statement about the graph is correct?
Which process is stimulated by adrenaline in the cells of the liver?
The diagrams show experiments to investigate the response of plant shoots to light. Which shoot will not grow towards the light? [Figure 27.1]
The diagram shows the life cycle of a species of plant. [Figure 28.1] During which stage does meiosis (reduction division) occur?
What is an advantage of sexual reproduction in plants?
Some features of four flowers, A, B, C and D, are recorded in the table. Which flower is most likely to be pollinated by wind? [Table 30.1]
The diagram shows the female reproductive system. Which label identifies the cervix? [Figure 32.1]
The graph shows the percentage of the population with different ABO blood groups in one region. [Figure 33.1] How does the graph suggest that varia...
For a gene with two alleles, A and a, which diagram identifies these alleles and the genotypes they can form? [Figure 34.1]
In the process of genetic modification to make artificial insulin (a protein), which material is inserted into the host bacterium and what effects ...
The diagram shows a food web for an ecosystem. [Figure 37.1] Which group of organisms in an ecosystem is not shown in this food web?
The graph shows the atmospheric carbon dioxide concentration from 1968 to 2000 in a country. [Figure 38.1] Every year there are variations in carbo...
The diagrams show what happens to rain when it falls on an area of forested land before and after houses are built. [Figure 39.1] What is the diffe...
The graph shows the concentration of oxygen in a river, measured at stations 1 to 5, each 100 m apart. There is a sewage outflow just after station...
The diagram shows a plant cell. What is the function of this cell?
The diagram shows a structure that was observed using a microscope. What does the diagram show?
The diagram shows the structures found in cell X. Which type of cell is X?
What is an example of an organ?
A new type of small vertebrate with lungs is discovered. This is identified as a reptile. Which vertebrate in the key is a reptile?