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 photomicrograph shows onion epidermis. [Figure 1.1] Which term describes this onion epidermis?
Identical pieces of potato are placed in sucrose solutions of different concentrations. After three hours, the mass of each potato piece is measure...
Which of these processes require energy from respiration? [Figure 3.1]
Cubes of hard-boiled egg white are placed in test-tubes containing 5 cm³ of water. Other substances are added to each tube as shown in the chart. T...
Which signs show that a plant has been grown in a culture solution deficient in magnesium?
The graph shows the rate of photosynthesis of a plant at increasing light intensities at two different carbon dioxide concentrations. The temperatu...
The diagram shows a section through a leaf. Which cells have the functions shown? [Figure 7.1]
The diagram shows a section of the small intestine in which partially digested food is being pushed along. What is the state of the longitudinal mu...
In which regions of the alimentary canal does amylase act?
Which substances are transported in xylem and in phloem? [Figure 10.1]
The table shows the recommended daily intake of energy and of iron for females at four different ages: 6 months, 5 years, 25 years and 75 years. Wh...
Five similar plants are placed in test-tubes as shown. Some of the plants have their leaves coated with grease to reduce transpiration. Each plant ...
The graph shows the pH of the saliva in the mouth after eating sugar. When are conditions in the mouth most likely to cause tooth decay? [Figure 13.1]
The diagram shows a vertical section through the heart. What are the functions of the numbered blood vessels? [Figure 14.1]
The diagram represents a blood capillary with an adjacent cell. The arrows represent the transfer of substances between the capillary and the cell....
The graph shows changes in the air pressure within the lungs during one breathing cycle. What causes the change in air pressure during stage X? [Fi...
What do the cilia do in the bronchi of the lungs? [Figure 17.1]
Fitness training increases the concentration of lactic acid that runners can build up in their muscles before pain stops them running. What is a co...
Which cannot be an example of excretion?
Which structures are all involved in controlling human body temperature?
The diagram shows a section through the brain and part of the spinal cord. Which row correctly identifies the cerebral hemisphere, cerebellum, medu...
Which is not controlled directly by the nervous system?
The diagram shows a reflex arc in which a bee sting causes the arm to be moved quickly. If the relay neurone at Q is damaged, how will the transmis...
The diagram shows a person doing ‘pull ups' on a horizontal bar. In moving from the lower position X to the upper position Y, which muscles and joi...
Bacteria were grown on an agar plate, until the plate was covered with visible yellow bacterial colonies. Four discs containing equal amounts of di...
The diagram shows the structure of a bacterium. In what way does this differ from a cell of a fungus? [Figure 26.1]
During the production of yoghurt and cheese, the pH of the mixture changes. What causes this change in pH?
What would be an undesirable feature in an insecticide?
The diagram shows a food web in woodland. In this food web, the beetles are [Figure 29.1]
Which bacteria convert urea to ammonia?
Which control measure would not help to prevent the spread of malaria?
Why is it important to control the amount of nitrate fertiliser used on farm land?
The diagram shows a section through a flower. In which structures are haploid nuclei formed by reduction division? [Figure 33.1]
A germinating seed is soaked in blue dye, which becomes colourless in tissues that are actively respiring. What will be the appearance of the cotyl...
After sexual intercourse, sperm can survive for 3 days in the uterus and oviducts. Ovulation can occur any time from day 13 to day 15 and an egg ce...
The diagram shows how the blood of a human embryo flows close to the mother's blood in the placenta. Which substances are present at X in higher co...
Which statement about human blood groups is correct?
Bacteria can be genetically modified to produce human insulin. What is a possible danger of this procedure?
Which statement about chromosomes is correct?
In maize, one allele of a particular gene allows chlorophyll production while the other allele prevents this, giving plants with cream coloured lea...
The diagram shows a plant cell. Which features are not found in animal cells?
The sentence describes the uptake of water by a plant. Water moves into the root hairs of a plant by osmosis through a ......1...... permeable cell...
Below is a series of cell processes. 1 mineral ions entering root hair cells 2 glucose uptake by villus cells 3 water entering root hair cells Whic...
A dish is filled with agar jelly containing starch. Four holes are cut in the jelly and each hole is filled as shown. After 30 minutes, which hole ...
Magnesium is an essential element for
The graph shows the effect of carbon dioxide (CO2) concentration on the rate of photosynthesis. What could be limiting the rate of photosynthesis a...
What are the advantages of chewing food at the start of digestion?
Which row correctly gives a good source of vitamin C and its deficiency symptom?
The diagram shows a green shoot photosynthesising under a glass jar. This was used as a control experiment in a laboratory investigation. Which dia...
A protein solution is tested using three different reagents. Which set of results is obtained?