Cambridge & Pearson Edexcel Past Paper Questions

In horses, red hair is dominant to brown. A breeder crosses a number of heterozygous red-haired horses. Approximately what percentage of the offspr...

Which row in the table is correct?

Which statement is correct?

Which diagram shows the positions of the chloroplasts and the nucleus in a cell?

How do plants absorb nitrate ions by active transport?

The diagram shows the net movement of water by osmosis between four adjacent cells. Which cell has the highest water potential?

The diagram represents an enzyme and four molecules, A, B, C and D. Which molecule is the substrate of this enzyme?

The diagram shows the upper layers of a leaf. What are the structures labelled X and Y?

A variegated plant is destarched and then placed in the sunlight for several hours. A leaf is then taken and tested for starch using iodine solutio...

A container is filled with water from a lake and placed on an outside table in the sunlight. Healthy plant seedlings are placed in the container an...

Which is a large molecule built up from amino acids?

Each part of the alimentary canal has the optimum pH for the enzymes that digest food there. What is the optimum pH for an enzyme that works in the...

Which features make a villus well adapted for absorbing amino acids from the ileum?

Samples of four different tissues are removed from the same plant. The concentration of water in each of the four tissues is measured. Which tissue...

The diagram shows chemicals being exchanged between some cells and a blood capillary. What could be the identities of chemicals P and Q?

The graph shows the death rates from coronary heart disease in two different countries. What could not explain the difference between the two count...

What happens to the diaphragm and the external intercostal muscles when breathing in?

The pie charts show the proportion of gases in samples of dried inspired and expired air. Which segments represent which gases?

The diagram shows the kidneys and associated structures. What are the contents of the labelled structures?

Which process keeps conditions such as temperature and glucose concentration constant inside the body?

What is a function of sensory neurones?

What are the cause, signs and symptoms and treatment for diabetes mellitus?

The diagram shows the label from a bottle of gin. What will happen, during the next few hours, after a person drinks a large amount of gin?

The diagram shows a food web. To which pair of animals is the greatest amount of energy available?

Some effects of deforestation are listed. 1 less absorption of carbon dioxide from the atmosphere 2 desertification 3 release of carbon from soil a...

The diagram shows a broad bean seed. Part of it has been cut away to show the internal structure. Which parts make up the complete embryo?

Human gametes are different from each other. Which information about male gametes is correct?

The main function of which hormone is to maintain the uterus lining after ovulation?

The diagram shows the inheritance of the allele, E, for polydactyly (having extra fingers) which is dominant over the normal allele, e. What are th...

Fig. 1.1 shows a plant cell before and after being placed in a concentrated salt solution. before after [Figure 1.1]

Fig. 2.1 shows a vertical section through a human heart viewed from the front. Two chambers, X and Y, are labelled. X Y [Figure 2.1]

(a) Fig. 3.1 shows the distribution of blood groups in the population of a country. percentage of population with each blood group (%) blood grou...

(a) Fig. 4.1 shows changes in the thickness of the uterus lining and in the concentration of progesterone in the blood during the menstrual cycle. ...

Fig. 5.1 shows a plant growing in an area of well-watered soil. [Figure 5.1]

Explain why most foods must be digested.

A person looks up from focusing on a near object to focus on an object further away. Describe how changes that take place in named components of th...

Name the components of human blood and explain how each component carries out its function.

Define the term excretion.

Fig. 1.1 shows a carpel of a flower with two pollen grains on top. [Figure 1.1]

Fig. 2.1 shows a sloth. The sloth is a mammal that lives in the trees of the South American rainforests. Sloths have the following features: • They...

Fig. 3.1 shows blood pressure changes as blood flows through part of the circulatory system, beginning at the right atrium, travelling to the lungs...

Fig. 4.1 shows a section through the leaf of a plant. [Figure 4.1]

Fig. 5.1 shows some human activities that have an effect on the environment. [Figure 5.1]

Describe the digestive processes that take place in the mouth (buccal) cavity of a human.

Explain how wilting occurs in a plant.

Describe how a bacterial cell differs from a typical animal cell.

Outline the processes of mitosis and meiosis, including references to where they occur.

Which row correctly shows the function of a cell structure and its location?

Which row describes diffusion into a cell?

The diagram represents apparatus used to investigate osmosis. [Figure 3.1] Which molecules will move across the partially permeable membrane and wh...