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 graph shows changes in the dry mass of a seed as it germinates and grows. [Figure 34] What causes the change shown between points S and T?
The graph shows the concentration in the blood of three of the four hormones FSH, LH, oestrogen and progesterone during a menstrual cycle. [Figure ...
Infection with HIV can result in death from AIDS. The graph shows AIDS-related deaths from 1990 to 2015 in a country. [Figure 36] What is the best ...
Some statements about chromosomes are listed. 1 A chromosome includes a long molecule of DNA. 2 Genes are found in chromosomes. 3 In cell division,...
One gene has two codominant alleles, Aᴱ and Aᴳ, and one recessive allele, Aᴴ. How many different genotypes and phenotypes are possible?
What is an advantage of genetic engineering?
Four features found in cells are listed. 1 cell membrane 2 chloroplasts 3 nucleus 4 starch grains Which two features are found in animal cells?
Which statement about diffusion is correct?
An experiment to investigate osmosis is set up as shown. [Figure 3.1] What happens to the height of the liquid in tube X and the concentration of t...
Which statement about enzymes is always correct?
The graphs show factors affecting the rate of photosynthesis. [Figure 5.1] At which points on the graphs could the rate of photosynthesis be limite...
What will happen to a plant that does not receive enough magnesium ions from the soil?
The table shows the colours obtained after testing three different foods for carbohydrates, fats and proteins. [Table 8.1] Which nutrients are pres...
Which two nutrients can lead to deformed bones if there is a deficiency of either of them in the diet?
The diagram shows a section through a plant stem. [Figure 11.1] Which process is responsible for moving substances in region Z?
What is transpiration?
How do veins differ from arteries? [Table 13.1]
Sickle cell anaemia is an inherited condition which causes abnormal red blood cells. Which health problem will be caused by this change in the red ...
The diagram shows the pressures in the left side of the heart during one heartbeat. [Figure 15.1] Which valves are open and which are closed at the...
What are uses of energy from respiration? [Table 16.1]
Which statements about gaseous exchange in the alveoli are correct? 1 The alveolus wall is one cell thick. 2 Carbon dioxide can diffuse through the...
The graphs show records of a person's breathing at rest and during exercise. [Figure 18.1] What is the increase in breathing rate when the person i...
Which diagram shows the diffusion of substances between the blood and dialysis fluid during dialysis? [Figure 19.1]
After exercise, human body temperature often rises above normal. What will help to return the temperature to normal?
The diagrams show the front view of the pupil and iris of the eye in different light intensities. [Figure 21.1] Which row correctly describes diagr...
The diagram shows some of the nerve pathways associated with a reflex action. [Figure 22.1] If the pathway at X is damaged, how does this affect th...
What occurs after an injection of insulin?
The diagram shows the bones of the forelimb. [Figure 24.1] Which bones form the hinge joint of the forelimb?
In an experiment, a person tested their reactions by measuring the time taken to catch a ruler that was dropped by another person. They then repeat...
What is the main role of yeast in the production of beers and wines?
What is a food chain?
Why is it important that carbon is cycled in nature?
The diagram shows part of the nitrogen cycle. [Figure 30.1] What are processes P, Q, R and S?
The table shows the source and the effect of four air pollutants. [Table 32.1] What are the four pollutants?
The diagram shows the mass of DNA in cells which are dividing. [Figure 33.1] Which row describes this type of cell division?
The graph shows changes in the dry mass of a seed as it germinates and grows. [Figure 34.1] What causes the change shown between points S and T?
The table gives statements about HIV. [Table 36.1] Which row correctly marks the statements as true or false?
What is an example of discontinuous variation in humans?
One gene has two codominant alleles, Aᴱ and Aᶠ, and one recessive allele, Aᴳ. How many different genotypes and phenotypes are possible?
During the division of a nucleus by meiosis, changes can happen that produce a gamete with an abnormal number of genes or chromosomes. Which change...
The diagram shows the human lungs and associated structures.
A farmer is growing a crop of tomato plants. (a) The tomato plants carry out photosynthesis. Describe the process of photosynthesis. (b) The farmer...
A man is cooking in a hot kitchen and sweat is being released by sweat glands in his skin. (a) (i) Explain the term homeostasis with reference to s...
The kapok tree is a flowering plant that grows rapidly to become one of the tallest trees in a tropical rainforest ecosystem. Climbing plants wind ...
The graph shows how blood alcohol concentration changes after a person drinks alcohol. 1.0 0.9- 0.8- 0.7- 0.6- blood alcohol concentration 0.5- / g...
Section B Answer both questions in this section. Write your answers in the spaces provided. (a) Explain the 'lock and key' hypothesis of enzyme act...
Section C Answer either Question 8 or Question 9. Write your answers in the spaces provided. (a) Water enters living organisms and is transported t...
Section C Answer either Question 8 or Question 9. Write your answers in the spaces provided. (a) Sperm cells and pollen grains are both involved in...
The diagram shows a photomicrograph of the lower surface of a leaf. [Figure 1.0]
The diagram shows the circulatory system of a fish. The lungs of a human and the gills of a fish both have a large surface area for gas exchange. [...