Cambridge & Pearson Edexcel Past Paper Questions

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 ...

The graph shows the changes in blood glucose concentration following the injection of a small amount of a substance into the blood of a person at t...

The diagram shows a section through an eye. [Figure 23.1] Which parts help to focus an image on the retina?

What happens when the body temperature of a human is controlled?

The table shows some of the possible effects of three drugs. Which combination of effects is correct?

The graph shows, for one country, the percentage of people who smoked cigarettes in the years 1960-2000. [Figure 26.1] Which statement about what h...

Which statement describes a problem of using antibiotics?

The diagram shows a food web. [Figure 28.1] What is the energy source for this food web?

The diagram shows a food web in a pond. [Figure 29.1] Which of the organisms is a carnivore, which is a herbivore and which is a producer?

The diagram shows part of the nitrogen cycle. [Figure 30.1] At which stage do bacteria cause decomposition?

Which method of control would not be effective against the spread of the malarial parasite?

The graphs show how the levels of dissolved oxygen and nitrates change along the length of a river. Which graph shows the effect of sewage entering...

The seeds of some plants will not normally germinate until they have been in the ground for several months. Some seeds were collected from a plant ...

The diagram shows the life cycle of a species of plant. [Figure 34.1] During which stage does meiosis (reduction division) occur?

Which disease is first recognised by painless ulcers which can be anywhere on the body?

In the female reproductive cycle, which sequence of events could occur in 28 days?

Bacteria can be genetically engineered to produce human insulin by adding a human insulin gene to the bacterial DNA. An advantage of this procedure...

A person has blood group A. Which statement about his genotype is correct?

In fruit flies, the allele for an ebony coloured body is recessive to the allele for a grey coloured body. In an investigation, an ebony-bodied fly...

Which statement about dominant and recessive alleles is not correct?

Which structures are present in a root hair cell? [Table showing nucleus and chloroplast columns with A, B, C, D rows and checkmarks/crosses. Key:...

What is an example of active transport?

An experiment measured the rate at which plants take up magnesium ions from solution. One plant was given a poison that stops respiration. Another ...

The diagram represents how an enzyme molecule changes in shape. [Figure showing a key-shaped molecule changing to a different, less defined shape....

The diagram represents a cross section of a leaf under the microscope. Where is light energy converted into chemical energy? [Figure showing a cr...

What is the effect of a lack of nitrate ions on plant leaves?

A green leaf is picked at time 07.00 and immediately placed in a sealed test-tube containing hydrogen carbonate indicator solution. The tube is kep...

Which table states the tests for different food groups?

What are the basic units from which molecules of glycogen and of protein are synthesised?

The table shows where different components of food are digested in the alimentary canal. Which option states where protein is digested? [Table sh...

What contributes to the wilting of plant leaves?

In an experiment to investigate the transport of water, the roots of a plant are placed in water coloured with a dye. The diagrams show sections o...

After muscular exercise, which blood vessel carries the lowest concentration of carbon dioxide?

The diagram shows the pressures in the left side of the heart during one heart beat. [Figure showing a graph of pressure / kPa vs. time / s, with ...

Two hours after eating a meal, which vessel contains blood with the highest concentration of glucose?

Which equation for anaerobic respiration in yeast is correct?

What happens to the diaphragm muscles and to the internal and external intercostal muscles when a person breathes out during exercise?

The graph shows changes in the amount of air in a person's lungs over a period of 30 seconds. [Figure showing a graph of lung volume / dm³ vs. tim...

In the human breathing system, which features maintain the carbon dioxide gradient between the alveoli and the outside air? 1 blood continually pu...

Which of these correct statements describes control by negative feedback?

The graph shows changes in blood glucose concentration when a body responds to an external stimulus. [Figure showing a graph of blood glucose conc...

The graph shows the changes in the size of the pupil of the eye as the light intensity of the surroundings is changed. [Figure showing a graph of ...