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

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

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

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

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

Theory

CH1 - CELL STRUCTURE

(a) Fig. 1.1 shows a simple apparatus that can be used to identify the tissue that conducts water up a stem. A cut shoot was placed in dye solution. A...

2009 Summer

Theory

CH1 - CELL STRUCTURE

(a) A species of snail is found in a variety of habitats. The shells of these snails may have dark bands on the surface of the shell (banded) or may n...

2009 Summer

Theory

CH1 - CELL STRUCTURE

(a) (i) Suggest why a continuous culture system was used to test the growth rate of this yeast...........................................................

2009 Summer

MCQ

CH1 - CELL STRUCTURE

Which cell structure can be seen only with an electron microscope?

2009 Winter

MCQ

CH1 - CELL STRUCTURE

A lymphocyte has a diameter of $1 \times 10^{-2}$ millimetres (mm).What is the diameter in nanometres (nm)?

2009 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