Cambridge & Pearson Edexcel Past Paper Questions

Some normal fruit flies are subjected to radiation in a laboratory. As a result, they produce offspring with unusual characteristics, such as white...

What would be the genotype(s) of the offspring from a cross between two organisms with the genotype Tt?

A plant is grown in bright sunlight. The diagram shows what is seen when a cell from a leaf is placed under a microscope. After a few hours, a leaf...

The diagram represents apparatus used to investigate osmosis. Which molecules will move across the partially permeable membrane and which change wi...

Which statements are correct for all enzymes? 1 They are proteins. 2 They are secreted into the alimentary canal. 3 They speed up biochemical react...

Which signs show that a plant has been grown in soil deficient in magnesium ions?

What is a function of each of these types of plant cell?

The diagram represents a cross section of part of a leaf. How does the oxygen content of the air at X compare to normal atmospheric air, when the l...

What are the substrate and end-products of digestion by the enzyme lipase?

Food tests were carried out on four different substances. Which substance contained both protein and reducing sugar?

In which direction do water molecules move in the phloem and in the xylem of a plant stem?

Four similar leafy shoots are exposed to different conditions. The rates of water uptake and the rates of water loss are measured. The results are ...

What is the correct route for blood flow in a human?

The table refers to blood vessels in the human body. What are P, Q, R and S?

The diagram shows an investigation of blood flow in the veins of the lower arm. A cloth is tightly wrapped round the arm at point Z and the veins s...

Seals are marine mammals. When they dive under water, they are capable of respiring anaerobically for long periods. During this time, blood flow to...

A person begins to smoke a cigarette at time X. The graph shows how their heart rate changes. Which substance in cigarette smoke is the main cause ...

In a kidney dialysis machine, which substance cannot diffuse through the dialysis membrane?

Which row describes the shoulder joint of an arm?

The diagram shows a section through the eye. In the pupil reflex, which row gives the sites of the effectors and receptors involved?

In a person suffering from diabetes mellitus, how do the concentrations of glucose in the blood and in the urine differ from those of a healthy per...

A local anaesthetic is a drug used to block nerve impulses. The diagram represents parts of the nervous system. X, Y, and Z show sites where the an...

Chemicals in tobacco smoke lead to the breakdown of the elastic tissue in the walls of the alveoli. What is the name of this condition?

The table shows the characteristics of four microorganisms. Which one could be a virus?

When bacteria act on milk, which row describes the formation of yoghurt?

Which processes increase and decrease the amount of carbon dioxide in the air?

The flow chart shows part of a food web in a field. What describes both the earthworm and the woodlouse?

The diagram shows parts of the nitrogen cycle. Which arrow represents the action of the root nodule bacteria of leguminous plants?

One method of preventing malaria is to reduce the number of vectors. Which control method will achieve this?

The graph shows how the pH of a lake has changed in the period 1500 AD to 2000 AD. What could have caused the change in the pH over the last 100 ye...

The diagram shows an experiment to find out if seeds need oxygen to germinate. Which change would make tube Y an effective control?

The diagram shows part of a flower after it has been pollinated. Which row correctly identifies one of the labelled structures?

What is the result of cutting both the sperm ducts in a man?

The diagram shows a section through the female reproductive system. During pregnancy, where does mitosis occur in the cells of the embryo?

Some genotypes that occur in blood groups are given. Which genotype results in a phenotype that shows co-dominance?

A human cell contains all of the following. Which is the smallest in size?

The allele for white flowers is recessive to the allele for red flowers. Which statement is not correct?

What is a result of natural selection?

The diagram shows cells in the epidermis of a leaf. To complete the diagram, which structural features should be added to the cells P and Q?

The list shows the absorption of three different substances by organisms. 1 mineral ions entering a root hair cell from the soil 2 oxygen entering ...

A cube of fresh potato is weighed. It is then placed in a test-tube containing a dilute solution of sucrose. After an hour, its mass has increased....

The diagram illustrates the 'lock and key' hypothesis of enzyme action. What are the enzyme, product and substrate in this reaction?

The equation for photosynthesis is represented below. Which words should be in the boxes?

What are the effects of a lack of magnesium ions and nitrate ions on plant growth?

A plant is kept in the dark for two days. One of its leaves is used in an experiment to investigate photosynthesis as shown in the diagram. What ar...

Which foods can be eaten to prevent scurvy, anaemia and rickets?

Which blood vessels carry absorbed nutrients and oxygen into the liver?

A piece of butter containing fat is eaten. After the fat has been swallowed, which chemicals will enter the stomach and the ileum?

The diagram shows a section through a root. Which tissue transports amino acids?

Which statement describes transpiration?