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..............................

2009 Summer

MCQ

CH7 - TRANSPORT IN PLANTS

Which plan diagram of a transverse section of a leaf correctly shows the position of xylem and phloem as well as the fact that the palisade mesophyll ...

2009 Winter

MCQ

CH7 - TRANSPORT IN PLANTS

The diagram shows the changes in pressure potential ($\Psi_p$), solute potential ($\Psi_s$) and water potential ($\Psi$) when a plasmolysed plant cell...

2009 Winter

MCQ

CH7 - TRANSPORT IN PLANTS

What is the sequence of events in the translocation of assimilates?

2009 Winter

MCQ

CH7 - TRANSPORT IN PLANTS

When stained, which features, visible under the light microscope, are part of the cells of the plant tissues listed in the table?[Table_1]

2009 Winter

MCQ

CH7 - TRANSPORT IN PLANTS

What is the sequence of events in the translocation of assimilates?

2009 Winter

MCQ

CH7 - TRANSPORT IN PLANTS

Which description states some of the features of xylem vessels?

2009 Winter

MCQ

CH7 - TRANSPORT IN PLANTS

The diagram shows the changes in pressure potential ($\Psi_p$), solute potential ($\Psi_s$), and water potential ($\Psi$) when a plasmolysed plant cel...

2009 Winter

MCQ

CH7 - TRANSPORT IN PLANTS

When stained, which features, visible under the light microscope, are part of the cells of the plant tissues listed in the table? [Table_1]

2009 Winter

Theory

CH7 - TRANSPORT IN PLANTS

(a) Explain what is meant by the term transpiration......................................................................................................

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