MCQ

CH8 - TRANSPORT IN MAMMALS

The graph shows the percentage saturation of haemoglobin with oxygen at different partial pressures of oxygen. Which range of partial pressures of ox...

2009 Winter

MCQ

CH8 - TRANSPORT IN MAMMALS

Below are correct statements comparing blood, tissue fluid and lymph in a capillary bed. • W lacks large plasma proteins and red blood cells and has...

2009 Winter

MCQ

CH8 - TRANSPORT IN MAMMALS

The graph shows the percentage saturation of haemoglobin with oxygen at different partial pressures of oxygen.Which range of partial pressures of oxyg...

2009 Winter

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

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

Theory

CH8 - TRANSPORT IN MAMMALS

Fig. 2.1 shows a diagram of a section through a human heart.(a) State the name and function of the circled structure labelled X.name ....................

2010 Summer

Theory

CH8 - TRANSPORT IN MAMMALS

(a) The glycoproteins CD28 and CD40 are found on the surface of T-lymphocytes (T-cells). They are binding sites for cell-signalling molecules and are ...

2010 Summer

MCQ

CH8 - TRANSPORT IN MAMMALS

The mammalian circulatory system is described as a closed double circulation.The diagram shows the circulatory system in a different organism. The arr...

2010 Winter

MCQ

CH8 - TRANSPORT IN MAMMALS

The diagram shows the valves inside the heart. Which valves are open or closed when the atria are relaxed and the ventricles contracted?

2010 Winter

MCQ

CH8 - TRANSPORT IN MAMMALS

When red cells leave the lungs, haemoglobin is 98% saturated.How many molecules of oxygen will be carried by the majority of haemoglobin molecules?

2010 Winter

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

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

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

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

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

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

2010 Summer

Theory

CH1 - CELL STRUCTURE

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

2010 Summer

Theory

CH1 - CELL STRUCTURE

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

2010 Summer

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

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

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