Cambridge Past Paper Questions
Browse 23,045questions from 25 years of O-Level & A-Level exams. Click any question to practice.
What is correct about the synthesis and release of the glycoprotein mucin in goblet cells? 1 The protein is produced on ribosomes and a carbohydrat...
What are functions of microtubules? 1 allowing movement of cilia in a bronchus 2 attachment to centromeres during metaphase 3 moving secretory vesi...
Which organelles contain nucleic acids? [Figure 5.1]
Which bonds are present in all viruses? 1 phosphodiester 2 peptide 3 covalent
A student carried out the Benedict's test on four different concentrations of glucose solution and then recorded the time taken for the first appea...
Which statements about amylopectin and glycogen are correct? 1 Amylopectin and glycogen contain 1-4 glycosidic bonds. 2 Amylopectin contains ẞ-gluc...
How many statements about fatty acids are correct? • Fatty acids are either saturated or unsaturated. • Fatty acids always have at least two double...
The diagram represents an amino acid. [Figure 11.1] R represents a variable side chain. What is not a possible side chain?
The graph shows the effect of an enzyme on a reaction. [Figure 12.1] Which row identifies X, Y and Z?
The graph shows the results of two experiments on the effect of increasing substrate concentration on the rate of an enzyme-catalysed reaction. One...
Which statements about the Michaelis–Menten constant (Km) of an enzyme are correct? 1 At the Km value, half the active sites of the enzyme should b...
Which component of cell surface membranes helps to reduce fluidity of the phospholipids at high temperatures?
Plant cells were left for 50 minutes in three different sugar solutions, 10%, 5% and 1%. The water potential in the cytoplasm of the three cells wa...
The graph shows the effect of increasing the side length of agar cubes on the surface area and the volume of the cubes. [Figure 17.1] Which row cor...
A human embryo consists of 12 cells at the start of day 1. The cells divide by mitosis for 4 complete days at a rate of 1 division every 32 hours. ...
Which diagrams show roles of mitosis? [Figure 19.1]
Which events are part of the mitotic cell cycle? 1 interphase 2 anaphase 3 cytokinesis
Which statement correctly describes a feature of a DNA molecule?
Which diagram correctly shows the replication of DNA? [Figure 22.1]
The RNA codon wheel is a tool used to find which amino acid would be translated from an mRNA sequence. [Figure 23.1] Codon position 1 is in the cen...
Four students sketched diagrams of the apoplast pathway and the symplast pathway. Which sketch is the most accurate diagram of the two pathways? [F...
The photomicrograph shows some xerophytic adaptations in leaf tissue. [Figure 25.1] Which row shows the correct functions for structures 1, 2 and 3?
Which processes are required for the transfer of assimilates from a source cell into a phloem sieve tube?
When sucrose is loaded into the phloem it has to travel from mesophyll cells to a companion cell and then into the phloem. Which row shows the rela...
Which feature of transport in plants is correct for xylem and phloem?
The diagram shows an anterior view of a vertical section through the human heart. [Figure 29.1] Which row shows the correct labels for the diagram?
What does the inner layer of veins and capillaries contain?
The graph shows the changes in blood pressure and water potential across a blood capillary from the arterial end of the capillary to the venous end...
Which statement is correct about a red blood cell that has just entered a capillary in a respiring muscle?
The graph shows some blood pressure changes that occur in a human during one cardiac cycle. [Figure 33.1] When does systole start and end in the ri...
Which statements about all bronchioles are correct? 1 They have goblet cells. 2 They have epithelial cells. 3 They have muscle tissue.
What is shown in the electron micrograph? [Figure 35.1]
Which statement correctly describes infectious diseases?
Organism X produces molecule Y, which blocks the activity of 70S ribosomes. An experiment was carried out to investigate the effect of Y on bacteri...
A patient has had repeated infections from the same pathogen over a few months. The patient has been treated with the same antibiotic on each occas...
A patient with kidney failure can be given a kidney transplant. In a kidney transplant, a healthy kidney is taken from another person and put into ...
The diagram shows the simplified structure of an antibody. [Figure 40.1] Which statement is correct?
Scientists measured the concentration of sodium ions and potassium ions in the red blood cells and in the blood plasma of a group of people. The re...
Fig. 2.1 is a transmission electron micrograph showing a section of a specialised epithelial cell found in the lining of the stomach. This cell pro...
Plants have specialised cells for the efficient transport of assimilates. (a) Table 3.1 shows some of the features of two different types of cell f...
Some people who are infected with HIV develop HIV/AIDS. (a) Fig. 4.1 shows the number of people that have been newly infected with HIV (new infecti...
Fig. 5.1 is a photomicrograph of a transverse section of a bronchus in the lungs. [Fig. 5.1]
During interphase and mitosis of the cell cycle, the chromosomes within a cell go through a number of changes. Each chromosome is composed of DNA c...
Keratin is the structural protein in feathers of birds. Keratin polypeptides are composed of a high proportion of cysteine amino acids, which have ...
The liver receives blood from the hepatic artery and from the hepatic portal vein. The hepatic portal vein transports blood from the digestive syst...
The alveoli of the lungs are the main gas exchange surface in humans.
Tuberculosis (TB) is an infectious disease caused by a bacterium. In the majority of people, only the lungs are affected. In most cases, the transm...
Water that is absorbed from the soil solution by the roots of a plant enters xylem vessels and is transported to the leaves and buds. Fig. 6.1 show...
You will investigate the effect of temperature on the production of carbon dioxide gas by yeast cells. Yeast cells contain enzymes that break down ...