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.
In an enzyme's action, where is the active site and where are the lock and the key?
The diagram represents a cross-section of part of a leaf as seen using a microscope. Where does translocation (movement of sucrose and amino acids)...
A student grows seedlings in four different test-tubes. Tube W contains all the mineral ions needed for healthy plant growth. The diagram shows the...
Which substance is built up from amino acids?
Where does bile enter the alimentary canal?
The surface area of the small intestine is increased by the villi in the intestine wall. How does the increased surface area help absorption of dig...
The photograph shows the cells of a vascular bundle from a stem, as seen using a microscope. What is tissue G, and what is its function?
When plants are growing in soil saturated with water, their roots lack oxygen. How will the functions of root hairs be affected in these conditions?
Which blood vessel transports blood into the liver?
The diagram shows the blood pressure of a person at rest as the blood leaves the heart and passes through arteries and then capillaries. Which line...
The diagram shows a section through part of a vein. What could be the first organs found in the directions 1 and 2?
Which word equation describes the respiration that occurs in an athlete's muscle cells before the start of a race?
Yeast is used in bread-making. Why does the bread contain little or no alcohol?
The diagram shows how a kidney dialysis machine works. Each shape represents a molecule found in blood or dialysis fluid. Which shape represents urea?
The diagram shows some of the structures seen in a section through human skin. What is the function of structure X?
The diagram shows a section through an eye. Which part is the receptor for the stimulus that results in a change in the size of the pupil?
The diagram shows the brain in vertical section. Which structure co-ordinates the menstrual cycle?
Which of these is a reflex action?
Which bones meet at the elbow joint and what kind of movement do they allow?
The diagram shows the percentages of injecting and non-injecting drug users who suffer from HIV/AIDS in a particular part of the world. What accoun...
Penicillin is produced by the fungus Penicillium. The stages involved are listed. 1 Corn and yeast are added to the fungus. 2 Penicillin is extract...
Which table shows the features of bacteria, fungi and viruses?
The graph shows changes in the populations of plant and animal plankton in a lake. Consider the following statement in relation to the data provide...
Which sequence is a food chain?
Which stage of the carbon cycle depends on the presence of bacteria and fungi in the soil?
Which term correctly describes the malarial pathogen?
Which two air pollutants contribute to acid rain?
The diagram shows the chromosomes in a cell. Which diagram shows the product of one division of the cell by mitosis?
The diagram shows the stigma, style and ovary of a flower. Where does fertilisation take place?
In which part of the human female reproductive system does a zygote start to divide to form a ball of cells?
What is the best way to prevent the spread of the human immunodeficiency virus (HIV)?
The diagram shows a pair of chromosomes from the same cell. A gene is found at the point labelled P. In a heterozygous individual, what will be fou...
Which characteristics show continuous and discontinuous variation in humans?
Which statements about natural selection are correct?
Which statements about genetically engineered plants show potential benefits? 1 The increased yield from genetically engineered plants allows a sma...
Which feature indicates that a root cell is from a plant and not an animal?
The diagram shows the result of an experiment. The liquid in the glass tube had risen to point X after three hours. [Figure 3] In a second experime...
Which type of molecule is used to synthesise glycogen?
What is most likely to cause rickets?
The diagram shows a structure that forms part of the wall of the alimentary canal. [Figure 10] In which part of the alimentary canal is this struct...
The following paragraph describes water uptake by roots. Root hair cells have ......1...... cell walls to allow them to absorb water. Cell cytoplas...
The diagram shows the pathway of water molecules through part of a leaf, seen under a microscope, in transverse section. Where does water evaporate...
The diagram shows the right side of the human heart when the ventricle is relaxed. [Figure 13] Which row correctly describes the positions of valve...
The diagram shows a section through part of a vein. [Figure 15] What could be the first organs found in the directions 1 and 2?
Which chemicals are produced in anaerobic respiration by yeast cells?
Two people of equal body mass do the same amount of exercise. One person is in good health. The other person has emphysema. The rate of oxygen ente...
The table shows the effect of exercise on the rate and depth of breathing. [Figure 18] What is the increase in the volume of air exchanged per minu...
The diagram shows the human urinary system. Which structure is the urethra? [Figure 19]
The diagram shows some of the structures seen in a section through human skin. [Figure 20] What is the function of structure X?
The diagram shows a horizontal section of a human eye. Which part contains receptor cells sensitive to light? [Figure 21]