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 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...
Which process involves the movement of molecules against a concentration gradient?
Many reactions in cells are dependent on enzyme activity. Which statement about enzymes is not correct?
Which changes occur in the air spaces of a green leaf on a sunny day?
Which diagram correctly links the carbohydrates made as a result of photosynthesis with their uses?
An investigation is carried out on the rate of photosynthesis in different environmental conditions. The graph shows the results. [Figure 9.1] Whic...
The diagrams show sections through a dicotyledonous root, stem and leaf. The vascular tissues are labelled using numbers 1–6. [Figure 11.1] The end...
Which nutrient deficiency causes scurvy?
Which sets of muscles contract to cause the body to breathe in?
Which processes use energy obtained from respiration? 1 contraction of intercostal muscles during breathing 2 nitrate ions entering a root hair cel...
During vigorous exercise, lactic acid builds up in the muscles. Blood leaving these muscles will have a high concentration of lactic acid. Which pr...
The table shows the mean rate of blood flow through some blood vessels. [Table 16.1] Which row correctly identifies the blood vessels?
What happens during blood clotting?
Which statement explains the association between smoking tobacco and emphysema?
What prevents pathogens from entering the human body?
A doctor obtains some bacteria from an infected patient. The bacteria are grown in a Petri dish containing nutrient agar jelly. The bacteria produc...
The table shows the concentration of five substances in the blood entering the kidney, in fluid entering the nephron and in the urine. [Table 21.1]...
The graph shows blood glucose concentration over 6 hours in a day. [Figure 22.1] What is the set point for blood glucose concentration shown by thi...
Which hormone can be used to treat Type 1 diabetes?
An athlete's resting body temperature is 37.0 °C. After vigorous exercise for 30 minutes, the athlete's body temperature rises to 38.6 °C. The athl...
Which endocrine gland produces follicle-stimulating hormone?
The diagram shows a plant grown on its side without light. [Figure 26.1] Which row explains the responses shown by the roots and the shoot?
The tips of growing shoots of a plant are cut off and placed on small blocks of jelly which contain no auxin. Small pieces of impermeable clear gla...
Which part of the flower develops into a fruit?
Which row shows possible effects of natural selection?
All organisms in the same species show variation. Some features of different types of variation are listed. 1 an example is body mass 2 has a limit...
Bacteria reproduce by splitting into two. This can happen every 20 minutes in ideal conditions of sufficient water, food and at a warm temperature....
What could be an advantage of genetically modifying crop plants?
An investigation is done to find out how effective different biological washing powders are at digesting protein. Four equal-sized cubes of cooked ...
Which enzyme is added to fruit to aid juice production?
The diagram shows a food web. [Figure 37.1] Which organisms in this food web are primary consumers?
The processes listed occur in living organisms in a food chain. 1 excretion 2 photosynthesis 3 respiration Which processes would result in a loss o...
Trees in a forest need a constant supply of nitrates to continue growing. The diagram shows some of the stages of the nitrogen cycle that provide t...
What is a method of conserving fish stocks?
State what is meant by the terms: Parallel data transmission Serial data transmission
State what is meant by the term USB.
Complete the truth table for the following logic circuit: [Figure showing logic circuit with inputs A, B, C and output X, and a truth table with co...
Choose six correct terms from the following list to complete the spaces in the paragraphs below: • encryption • file name • firewall • HTML tags/t...
Five storage devices are described in the table below. In column 2, name the storage device being described. In columns 3, 4, or 5, tick (√) to s...
Viruses, pharming and phishing are all examples of potential Internet security issues.
One of the key features of von Neumann computer architecture is the use of buses.
An alarm clock is controlled by a microprocessor. It uses the 24 hour clock. The hour is represented by an 8-bit register, A, and the number of min...