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 herbaceous plant, growing in a nutrient solution, is placed in a well-lit experimental chamber through which humid air is being passed slowly. Th...
The photomicrograph shows part of a sunflower stem. Which tissue transports water and mineral salts and which tissue transports sucrose?
How do veins differ from arteries?
The table shows the characteristics of the blood in one blood vessel in the body. Which blood vessel contains blood with these characteristics?
The diagram shows a section through the human heart. What happens as blood is being pumped out of the heart?
What happens to the diaphragm when breathing in?
Which process does not depend on respiration?
An experiment is set up as shown. After four hours, the coloured water will
What is the correct sequence of the bones in the arm of a mammal, from the hand to the shoulder?
What is not an excretory product of mammals?
The diagram refers to the control of water concentration in the blood. Why is this a negative feedback system?
The diagram represents a section through the brain and part of the spinal cord. Which part of the brain controls balance?
What are the functions of the relay, motor and sensory neurones in a reflex response?
What decreases as a result of adrenaline secretion?
The graph shows the relationship between the average age at death and the number of cigarettes smoked per day. Which conclusion from the graph is c...
Using the flow diagram, which organism is a fungus?
The diagram shows a fermenter used to produce penicillin. Why is air pumped into the fermenter?
On decomposition, which substance in decaying plants is the major source of carbon for carbon dioxide production by the micro-organisms involved?
The diagram shows part of the nitrogen cycle. Which substance at X forms part of this cycle?
The diagram shows part of a food web. How many herbivores are shown?
Three statements about malarial parasites are listed. 1 Insecticides are used to kill the vectors. 2 Netting is used to keep the vectors away from ...
If high levels of nitrates are washed into rivers, the following changes may occur, causing fish to die. 1 Water plants die and fall to the bottom....
The diagram shows part of a flower at the time of pollination. How does the male gamete reach the female gamete?
Which statement correctly describes advantages or disadvantages of self-pollination to a plant?
The diagram shows a side view of the female reproductive system. In which region are sperms released during sexual intercourse and where does ferti...
Which disease can be cured by antibiotics?
A man is blood group A and his wife is blood group AB. What are the possible blood groups of their children?
Which of these may be heterozygous?
Flower colour is controlled by a single pair of alleles. The allele for red flowers is dominant to the allele for white flowers. A plant homozygous...
In the commercial manufacture of insulin, a human gene is inserted into which of these?
What is found in both animal and plant cells?
The diagram shows part of a leaf with three spongy mesophyll cells labelled P, Q and R. The arrows show the direction of water movement by osmosis....
Starch is digested to maltose by the enzyme amylase. According to the 'lock and key' hypothesis, which is the 'key' and which is the 'lock'?
The graph shows how the rate of photosynthesis varies with light intensity at two different temperatures. Other variables are kept the same. [Figur...
The diagram shows cells in a section through a leaf of a green plant. (No cell contents are shown.) [Figure 6.1] Which cells contain chloroplasts?
Two aquarium tanks are set up as shown. [Figure 7.1] After a week, all the animals in tank Y show signs of distress. This is because the animals ha...
Which chemical elements are present in both fats and proteins?
Which two foods would provide the best sources of carbohydrates, calcium, fibre (roughage) and vitamin C?
The diagram shows a section through a villus. [Figure 10.1] Which sequence correctly describes the functions of the numbered parts?
The photomicrograph shows part of a section through a stem. [Figure 11.1] The contents of cell X and the contents of cell Y are each tested with Be...
The diagram shows a section through a green leaf. [Figure 12.1] The arrows represent the movement of
The diagram shows the direction of blood flow in the human body. [Figure 13.1] Which numbered stages have blood containing the most oxygen?
Which row in the table describes the features of the pulmonary vein?
Which is a difference between plasma and tissue fluid?
What is the equation for anaerobic respiration in yeast?
The diagram represents the human respiratory system. [Figure 17.1] Which structures contain muscles that contract when breathing in?
Which process does not require energy?
The diagrams show the positions of the bones of the forearm as it is raised. The muscles which move the bones are only shown in the first diagram. ...
In a kidney machine, protein molecules are not lost from the blood. How is loss of protein prevented?
The diagram shows skin temperature of a human when exposed to warm air and then exposed to cold air. [Figure 21.1] What causes the observed change ...