MCQ

CH11 - IMMUNITY

An antibiotic inhibits the formation of cross-links between the molecules that form cell walls in bacteria. Which statements explain why bacteria are...

2024 Summer

3

MCQ

CH11 - IMMUNITY

How does the antibiotic penicillin affect the metabolism of a bacterial cell?

2024 Summer

5

MCQ

CH11 - IMMUNITY

Scientists investigated the effect of increasing concentrations of an antibiotic on the development of antibiotic resistance in bacteria.The scientist...

2024 Summer

4

MCQ

CH11 - IMMUNITY

Scientists studied the multidrug-resistant bacterial infections in children caused by one type of bacteria between 2007 and 2015. The percentage of mu...

2024 Summer

4

MCQ

CH11 - IMMUNITY

What is the correct sequence of events in a primary immune response?

2024 Summer

3

MCQ

CH11 - IMMUNITY

Whooping cough is a highly infectious disease of the gas exchange system, caused by the bacterium Bordetella pertussis.Which method provides protectio...

2024 Summer

4

MCQ

CH11 - IMMUNITY

Monoclonal antibodies are now being used to treat some human diseases.What explains why monoclonal antibodies are suitable for this purpose?1 They can...

2024 Spring

3

MCQ

CH11 - IMMUNITY

Which statement about the properties of the antigen-binding sites in different antibody molecules is correct?

2024 Summer

3

MCQ

CH11 - IMMUNITY

What will be produced by the division of memory cells during a secondary immune response?

2024 Winter

4

MCQ

CH11 - IMMUNITY

Why is mitosis important in the immune response?

2024 Summer

6

Theory

CH2 - BIOLOGICAL MOLECULES

(a) Fig. 1.1 shows the breakdown of a molecule of sucrose.(i) Name the bond indicated by T...............................................................

2010 Summer

3

Theory

CH1 - CELL STRUCTURE

(a) Calculate the actual diameter of the alveolus along the line X–Y.Show your working and give your answer to the nearest micrometre.Answer = ........

2010 Summer

3

Theory

CH8 - TRANSPORT IN MAMMALS

(a) Fig. 3.1 shows a cross-section of the heart at the level of the valves.[Image_1: Fig. 3.1](i) Complete the following flow chart to show the pathwa...

2010 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

Malaria and tuberculosis (TB) are two of the most important infectious diseases.(a) Define the term \textit{infectious disease}..........................

2010 Summer

3

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

(a) Name the stage during the mitotic cell cycle when replication of DNA occurs..........................................................................

2010 Summer

2

Theory

CH1 - CELL STRUCTURE

(a) Name the processes that occur at H, J and K.H .......................................................................................................

2010 Summer

3

Theory

CH1 - CELL STRUCTURE

(a) Explain how Fig. 1.1 can be identified as a plant cell...............................................................................................

2010 Summer

3

Theory

CH8 - TRANSPORT IN MAMMALS

Fig. 2.1 is a diagram of a vertical section through a healthy mammalian heart. (a) (i) Label the two chambers of the heart by writing in the boxes pro...

2010 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

(a) Using the ‘without HIV/AIDS’ and ‘with HIV/AIDS’ data shown in Table 3.1, calculate the percentage decrease in life expectancy for Botswan...

2010 Summer

3

Theory

CH2 - BIOLOGICAL MOLECULES

Fig. 4.1 shows the primary structure of a lysozyme molecule, an enzyme found in tears, saliva and in lysosomes. (a) (i) Explain what is meant by th...

2010 Summer

3