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 diagram shows the effect of temperature on the rate of an enzyme-controlled reaction. What is the explanation for the part of the graph labelle...
A small mountain lake has aquatic plants growing under water on the lake bed. Shortly after heavy rainfall, the mud on the lake bed becomes stirred...
Some plants have large leaves and are growing well but the leaves are turning yellow. Which factor is likely to be causing this problem?
Which row shows the average daily energy requirement for the people in the table?
The diagram shows an experiment. After 30 minutes, tests were carried out on the contents of the membrane bag and on the water in the beaker. Which...
The graph shows the transpiration rates of two plants during one day. Both plants were grown under identical conditions. Which statement explains w...
Some people have a rare heart condition in which the lower left chamber of the heart has not developed properly and is much smaller than normal. Th...
Tissue transplants are normally rejected by the body unless the transplant tissue and the patient are very carefully matched. Which component of th...
The diagram shows movement of substances between blood in a capillary and tissue fluid. By which process does water move from tissue fluid to capil...
An experiment is set up, as shown. Test-tubes 1 and 2 contain limewater. Limewater is a clear solution that turns cloudy in the presence of carbon ...
Which equation represents anaerobic respiration in yeast?
The graph shows the rate and depth of breathing at rest. Which graph shows the rate and depth of breathing during exercise?
How do the concentrations of oxygen and urea in the renal artery compare to their concentrations in the renal vein?
Which changes occur when a person walks from a very cold room into a hot room?
The diagram shows a section through part of the skin. Which structure is the best insulator?
The graph shows changes in the shape of the lenses of a person's eyes while watching a bird flying. At which point is the bird flying most rapidly ...
The diagram shows the nerve pathway in a reflex action when a person accidentally touches something hot. Which row correctly identifies a sensory n...
A patient shows symptoms of unexplained weight loss, severe thirst and frequent need of urination. A test shows high levels of glucose in the urine...
The diagram shows the forelimb of a rabbit. Which labelled bone is the ulna?
Which activity is most likely to cause lung disease?
The table shows some features of three types of microorganism. Which row identifies each type of microorganism?
Which types of microorganism carry out decomposition in the nitrogen cycle?
Which actions can be used to control the malarial pathogen?
The graph shows the concentration of dissolved oxygen at different points along a river. At which point is sewage emptied into the river?
The diagram shows how bees visit a species of flowering plant that has tall spikes of flowers. In the flowers at the base of the spike, the carpels...
The diagram shows a section through a dicotyledonous seed. Which structure provides most of the nutrients needed for the seed to grow after germina...
The diagram shows the menstrual cycle. The numbers refer to the number of days after the beginning of menstruation. Which label shows a point in th...
A variety of snail has an inherited condition that affects the thickness of the shell. St St have thick shells. St Sh have thin shells. Sh Sh do no...
A man of blood group A and his wife of blood group O had two children, both of blood group A. The man concluded that he must be homozygous for the ...
In a garden there is a species of insect which can be either red or green in colour. The green insects are well camouflaged. Birds that eat insects...
What can be the benefits of genetic engineering of crops? 1 crops that can be stored for longer 2 crops with a better flavour 3 less use of fertili...
The diagram represents the cell structures of a bacterial cell, a liver cell, an onion epidermal cell and a red blood cell. Which structure is repr...
Which process is moving nitrate ions into the cell shown?
Fats are broken down by the enzyme lipase to produce fatty acids and glycerol. According to the 'lock and key' model of enzyme action, what is the ...
The graph shows the effect of varying pH values on the activity of four different enzymes, A, B, C and D. Which enzyme is active in the stomach?
The graph shows how the yield of a wheat crop varies with the addition of different amounts of nitrate fertiliser. What can be concluded from the g...
A lack of certain minerals and vitamins can lead to deficiency diseases. Which row shows the correct symptoms of such diseases?
The diagram shows how food is processed in the human alimentary canal. Which row correctly identifies the named stages?
The table shows weather conditions in a field. Which row shows conditions that would cause a plant to wilt most rapidly?
Which route does blood take around the body?
The diagram shows the transfer of materials between blood in a capillary and tissue fluid. Which row shows the correct labels for the arrows in the...
Fitness training in athletes reduces the need for anaerobic respiration. It also increases the rate at which lactic acid is removed after exercise....
The diagram shows the human gas exchange system. Which row shows the correct labelling?
What are two main functions of the kidneys?
The graph shows measurements taken of one aspect of the internal environment of the human body over time. What controls the internal environment of...
When a bright light is shone into the eye, the pupil becomes smaller. Which statement explains this response?
The flow chart describes a reflex action. Which row correctly fills the flow chart?
Which graph shows the lengths of the biceps and triceps muscles in the upper arm when the elbow joint is fully extended and the arm is straight?
Four discs, A, B, C and D, each containing a different antibiotic, were placed onto agar gel in a Petri dish. The agar gel contained E. coli bacter...
Bacteria, fungi and viruses are often grouped together as microorganisms. Which statement about microorganisms is correct?