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

CH1 - CELL STRUCTURE

Fig. 1.1 shows the outline of a ciliated cell from the human gas exchange system.(a) (i) Inside the ciliated cell in Fig. 1.1, draw the nuclear envelo...

2009 Summer

2

Theory

CH18 - BIODIVERSITY, CLASSIFICATION AND CONSERVATION

(a) The table below gives some terms that are used in ecology and their definitions. Complete the table.termdefinitionecosystemall the organisms and t...

2009 Summer

2

Theory

CH4 - CELL MEMBRANES AND TRANSPORT

(a) With reference to Fig. 3.1 and the information above, explain how flatworms survive without a transport system for respiratory gases. ...............

2009 Summer

2

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

(a) With reference to Fig. 4.1,(i) nameprocess A ..............................................................molecule B ...............................

2009 Summer

3

Theory

CH7 - TRANSPORT IN PLANTS

Fig. 5.1 shows part of a transverse section of a leaf.   (a) Explain, in terms of water potential, how water moves from Q to R. [4] (b)...

2009 Summer

2

Theory

CH5 - THE MITOTIC CELL CYCLE

(a) Fig. 6.1 is an electron micrograph of a cancer cell in the process of dividing by mitosis. The stage of mitosis visible in Fig. 6.1 is metaphase.S...

2009 Summer

3

Theory

CH1 - CELL STRUCTURE

Yeast cells contain enzymes, which catalyse the breakdown of glucose to produce ethanol and carbon dioxide. These products change the environment of t...

2009 Summer

2

Theory

CH1 - CELL STRUCTURE

J1 is a slide of a stained transverse section of a plant organ.(a) Draw a large, low power, plan diagram of a quarter of the specimen as shown in Fig....

2009 Summer

1

Theory

CH1 - CELL STRUCTURE

(a) (i) Using the information in Table 1.1, decide which other concentrations to make and complete Table 1.2 including the concentrations from Table 1...

2009 Summer

2

Theory

CH1 - CELL STRUCTURE

K1 is a slide of a stained transverse section of a plant organ.(a) (i) Draw a large, low power plan diagram of one end of the specimen on K1 as shown ...

2009 Summer

3