Cambridge & Pearson Edexcel Past Paper Questions

The diagram represents the 'lock and key' mechanism of an enzyme that works best at pH7. [Figure 4 - Diagram showing an enzyme and a substrate, wit...

What are the signs of magnesium deficiency and nitrogen deficiency in leaves of plants? 1 purple spots on leaves 2 reduced growth of roots 3 reduce...

When carbon dioxide is being used in photosynthesis, what is its diffusion pathway in a leaf after entering a stoma? 1 cell membrane 2 cell wall 3 ...

The diagram shows the arrangement of the tissues of a leaf as seen in cross-section under the microscope. [Figure 7 - Diagram showing a cross-secti...

Which combination of mineral and vitamin is required for strong bones?

The graph can be used to estimate the daily energy requirements of women, depending on their mass and level of activity. [Figure 9 - Graph showing ...

The diagram shows two different human teeth, P and Q, drawn from the front. [Figure 10 - Diagram showing tooth P (incisor) and tooth Q (molar)] Wha...

The diagram shows a section through the stem of a dicotyledonous plant. [Figure 11 - Diagram showing a cross-section of a plant stem with four labe...

What is the main source of the energy that causes water to rise up a plant stem?

The diagram shows a section through part of a vein. [Figure 14 - Diagram showing a section of a vein with a valve, and two arrows labelled 1 and 2 ...

What are the products of aerobic respiration in a muscle?

The diagram shows apparatus that can be used to measure the rate of anaerobic respiration of yeast. [Figure 17 - Diagram of apparatus with scale, c...

The diagram shows the human urinary system. [Figure 19 - Diagram of the human urinary system with structures labelled 1, 2, 3, 4] What are the corr...

Which part of the brain controls body temperature?

What is the role of motor neurones in reflex action?

Opticians sometimes place drops of a chemical in a patient's eye to keep the pupil wide open. Which muscles contract when this chemical is used?

The diagram shows parts of the human forelimb. [Figure 24 - Diagram showing the human forelimb with muscles and a nerve labelled X] What will happe...

Yeast is used in alcohol production. Under which conditions will yeast produce most alcohol?

Using the key, which organism is a virus? 1 has a cell wall -> go to 2 does not have a cell wall -> go to 3 2 cell wall is made of chitin -> organi...

The diagram shows a pyramid of biomass. [Figure 29 - Diagram showing a pyramid with three levels labelled 1 (bottom), 2 (middle), 3 (top)] What do ...

The diagram shows some of the stages in the carbon cycle. [Figure 30 - Diagram showing the carbon cycle with 'carbon dioxide in the atmosphere' at ...

Which words can all be applied to the organism that causes malaria?

Which activities can lead to soil instability?

What is the function of the sepals of most flowers?

Cell X contains 24 chromosomes. It divides by mitosis to produce cells Y and Z. [Figure 34 - Diagram showing cell X dividing into cell Y and cell Z...

What are the symptoms in the different stages of syphilis?

What is the effect of environment on discontinuous variation, and what is an example of this type of variation in humans?

In the inheritance of blood groups in humans, the MN system is controlled by a single gene. The gene has two alleles, M and N, that are co-dominant...

Fig. 1.1 shows a sample of human blood seen using a microscope. B C A [Figure 1.1]

Fig. 2.1 shows the mean distance that molecules must travel during gas exchange between air in the lungs and blood in the circulatory system in bir...

Fig. 3.1 shows some parts of the human alimentary canal and associated organs. oesophagus duodenum stomach stomach wall where an ulcer may develop ...

Fig. 4.1 shows a type of plant cell. [Figure 4.1]

Fig. 5.1 shows a food chain. tree caterpillar bird [Figure 5.1]

Define the term homeostasis.

Compare the processes of mitosis and meiosis.

Explain how humans are dependent upon the process of photosynthesis.

Outline the role of a named type of microorganism in the production of each of the following products. bread type of microorganism role yoghurt typ...

State three substances found in the urine of a healthy person.

Two students performed an experiment to illustrate inheritance. They each made a 'spinner' similar to the one shown in [Figure 2.1]. A result is re...

[Figure 3.1] shows a flowering head of wheat, and individual flowers before and after opening. The anthers release most of their pollen before the ...

[Figure 4.1(a)] shows the reproductive organs of a man and [Figure 4.1(b)] shows the reproductive organs of a woman.

Cacti are plants that grow in desert conditions. [Figure 5.1] shows a type of cactus. [Figure 5.1] shows leaves reduced to form spines and a green,...

Explain the fact that humans breathe while plants do not.

Describe how a virus differs from a bacterium.

Describe how peristalsis causes food to be moved along the alimentary canal.

Explain the health risks of each of the following: (i) a high-fat diet

The cell wall of a plant cell is removed using an enzyme. What would happen if this cell is then placed in distilled water?

Which processes are responsible for the uptake of ions from the soil by a plant and the uptake of glucose into the villi of a human?

The diagram shows three plant cells labelled P, Q and R. The arrows show the direction of water movement by osmosis. [Figure 3.1] What is the corre...

The diagram shows a plant cell. [Figure 5.1] Compared with the rest of the cell, which row describes the concentrations of oxygen and magnesium ins...