Cambridge & Pearson Edexcel Past Paper Questions

Dry mass is the mass of all chemicals, excluding water, present in an organism. Fig. 2.1 shows the stages of germination of a seed. Fig. 2.1 also s...

Digestion in the human alimentary canal is carried out by the action of enzymes. Each food group is the substrate for a specific enzyme. [Figure 3.1]

Fig. 4.1 shows the stages in the process of genetic engineering to produce the hormone insulin. [Figure 4.1]

Malaria is a disease caused by a parasite that is transmitted from one person to another by a vector.

Enzyme Q is active in the human alimentary canal. Fig. 6.1 shows the effect of pH on the rate of reaction of enzyme Q. [Figure 6.1]

Describe how the nitrogen cycle makes nitrogen in the air available for both plant and animal protein.

The brain is one component of the nervous system.

The grape plant has many flowers clustered together on each flowering head. Fig. 1.1 shows the structure of one mature grape flower. [Figure 1.1]

Fig. 2.1 shows a fetus developing inside its mother. [Figure 2.1]

Table 3.1 is a list of some of the constituents of a healthy human diet. [Table 3.1 showing: constituent (carbohydrates, fats, proteins, mineral sa...

Fig. 4.1 shows the leaves of the same plant during daylight and during the hours of darkness. [Figure 4.1(a) in daylight; Figure 4.1(b) in darkness]

Table 5.1 shows a number of processes that occur in the lungs and thorax (chest cavity). [Table 5.1 showing processes: diffusion into red blood cel...

Describe the differences in structure and function between a cell wall and a cell membrane.

Seeds require certain conditions before they will germinate. List these conditions and, for each condition you mention, suggest how it is important...

Describe the industrial manufacture of single cell protein.

With reference to the inheritance of blood groups, explain what is meant by each of the following terms:

The diagram shows cells from a plant leaf. Which structure contains a high concentration of magnesium?

Which of these processes will always occur down a concentration gradient?

A student cuts out four cylinders of potato. Each cylinder is 30mm long. The cylinders are all of the same diameter. The potato cylinders are place...

Which are properties of enzymes?

Two test-tubes, P and Q, were set up, each containing a solution of red hydrogencarbonate indicator. Hydrogencarbonate indicator turns yellow when ...

Which graph shows the effect of temperature on the rate of photosynthesis?

Some people wear clothing that covers large areas of their skin. They are at risk of a dietary deficiency disease where sunlight is in short supply...

Which is not a function of the liver?

A person has a blockage in their bile duct. What will be a result of this?

Water and ions can reach the xylem of a plant root through cell walls, without passing through a cell membrane. How do these substances move throug...

An area of grassland becomes flooded with sea-water. Sea-water contains a high concentration of salt. What is the effect of the sea-water on the fu...

Which chamber of the heart has the thickest walls?

Which row shows the blood pressures in an artery, a capillary and a vein?

What is a difference between plasma and tissue fluid?

Which changes occur in the diaphragm and intercostal muscles when a person breathes in?

Which is produced during anaerobic respiration in muscles?

The graph shows changes in the amount of air in a person's lungs over a period of 30 seconds. In which time period is the rate of breathing fastest?

An analysis of the composition of expired air is shown. Using only data from the table, what percentage of the expired air is excreted material?

Which parts of the skin are involved in the control of body temperature?

A person looks at some hills far away. Which row shows the state of the lenses, ciliary muscles and suspensory ligaments in her eyes?

What are characteristics of hormones?

The diagram shows some of the nerve pathways associated with a reflex action. If the pathway at X is damaged, how does this affect the reflex?

The diagram shows some of the bones and muscles in a human arm. Which is a correct description of the changes that cause the forearm to be raised?

Which of these diseases can be treated effectively with antibiotics? 1 HIV 2 malaria 3 syphilis

The diagram shows some characteristics of different organisms. What do areas X and Y represent?

The diagram shows a simple apparatus that could be used to produce alcohol. What is the role of the U-shaped tube containing water?

Why does an ecosystem need to be exposed regularly to sunlight?

The diagram shows a food chain. tree → mice → cats → fleas What is the shape of the pyramid of numbers for this food chain?

The diagram shows part of the nitrogen cycle. Which process occurs at X?

Which row shows the malarial parasite and the vector involved in its transmission?

Which plants are most likely to adapt successfully to a climate change in their environment?

The diagram shows a flower cut in half. Which two parts of the flower produce haploid gametes?

The diagram shows some stages in cell division in a fruit fly. Cell X contains 8 chromosomes. How many chromosomes are in cell Y and in cell Z?

What is the path taken by sperm cells during ejaculation from the male reproductive system?