Cambridge & Pearson Edexcel Past Paper Questions

Molecules and ions can be moved into and out of cells by active transport. Which statement about active transport is not correct?

Frogs are amphibians and so have a partially permeable skin. They live in and near water such as lakes and marshes, where the water contains a low ...

The diagram shows an enzyme molecule. Which diagram shows the substrate molecule for this enzyme?

The enzyme amylase catalyses the breakdown of starch into maltose. The effect of different pHs on the time it took for this breakdown to occur when...

What are features of enzymes? 1 They act on specific substrates. 2 They are carbohydrates. 3 They are catalysts. 4 They are involved in some, but n...

The diagram shows a transverse section through a leaf. In which parts of the leaf can photosynthesis take place?

Which transverse section photomicrograph shows the position of the xylem and phloem in a non-woody dicotyledonous stem?

Students set up apparatus to measure the uptake of water by a leafy shoot. They recorded the position of the air bubble at the start. They observed...

The percentages of each of the gases in inspired and expired air are measured when a student is resting and when a student is exercising. The resul...

Which balanced chemical equation shows aerobic respiration?

Blood is made up from a number of different components. The pie chart shows the percentage volume of each of the components of blood. What is the p...

What is the total number of atria and ventricles that the blood passes through during two complete circuits of the human body?

The table shows the range of percentages of different types of tissue found in the walls of the aorta of people of different ages. Collagen tissue ...

The table shows information about three different blood vessels, P, Q and R. One of the vessels is an artery, one is a capillary and one is a vein....

The table shows the number of deaths estimated to be due to smoking in England each year from 2009 to 2019. Using the information in the table, whi...

What is a method used to control the malarial vector?

Which disease can be treated by using antibiotics?

Which structure is the ureter?

The processes of filtration and reabsorption take place in the kidneys. The daily amounts of some of the substances entering the kidneys in the blo...

Where are the receptors for the pupil reflex located?

The internal body temperature of some animals, including humans, remains constant even when the external temperature changes. The graph shows how t...

Which statements about synapses are correct? 1 Synapses are junctions between neurones. 2 Synapses ensure impulses travel in only one direction. 3 ...

Which process is not part of a homeostatic mechanism in mammals?

A nurse tests a sample of urine from a patient using Benedict's reagent. The sample tests positive. What is a possible explanation for this result?

Why do plant shoots grow towards light?

Which statement about nuclear division is correct?

Stem cells are found in human embryos. Which statements about stem cells are correct? 1 Stem cells are unspecialised cells. 2 Stem cells can divide...

In the placenta, which substance passes from the blood of the embryo to the blood of the mother down a concentration gradient?

What is the main function of the prostate gland?

The graph shows the changes in levels of four hormones during the menstrual cycle. Which line represents progesterone?

Which row identifies the factors causing continuous and discontinuous variation?

Which row shows what happens in the eye when focusing on a nearby object?

What is the principal source of energy in most biological systems?

Untreated sewage contains nitrates and phosphates. What will happen in the lake if untreated sewage is added?

DDT is an insecticide that is harmful to living organisms. It builds up in the cells of living organisms as it is not excreted. The diagram shows t...

Which terms describe the parts of a plant? [Table]

The diagram shows a root hair. [Diagram] Which arrows show the direction in which it is possible for nitrate ions and water molecules to move? [Table]

Four identical pieces of potato are treated in two stages, as shown. Which piece of potato will be largest after 2 hours? [Table]

Which graph shows the effect of temperature on enzyme-controlled reactions? [Graphs A, B, C, D]

Lack of nitrate ions (NO3¯) in flowering plants causes yellowing of leaves and poor growth whereas lack of magnesium ions (Mg2+) causes yellowing b...

The graph shows the effect of light intensity on the rate of photosynthesis. [Graph] Which statement could explain what is happening at higher ligh...

A freshly picked leaf is placed in a sealed test-tube with some hydrogen carbonate indicator solution. The tube is kept in the light during the day...

The diagram represents the liver and associated blood vessels. [Diagram] After a meal, how is the blood affected by the liver as it passes between ...

Which chemical test shows the presence of an enzyme in a biological washing powder?

The symptoms of a disease include weakness, fatigue, aching and swollen joints, bruise-like spots round the hair follicles and swollen and soft gum...

Which adaptations of a root hair cell make it suitable for water uptake? [Table]

The diagram shows part of a flowering plant. [Diagram] Where does most transpiration take place?

Vitamin C changes cholesterol into a form which is less likely to be deposited in artery walls. Which dietary advice would help prevent coronary he...

The diagram shows a blood capillary close to some tissue cells bathed in tissue fluid. Exchange of nutrients takes place here. [Diagram] Which row ...

The following changes take place in an athlete's body during a 100 m race. Which change occurs first?