Theory

CH12 - ENERGY AND RESPIRATION

(a) The respiratory quotient (RQ) is used to show what substrates are being metabolised in respiration.The RQ of a substrate may be calculated using t...

2009 Summer

Theory

CH12 - ENERGY AND RESPIRATION

(a) Describe the process of glycolysis. [7] (b) Describe the structure and synthesis of ATP and its universal role as the energy currency in all livi...

2009 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) Outline the main features of the Krebs cycle. [9](b) Explain the role of NAD in aerobic respiration. [6]

2009 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) The initial stages of respiration convert one molecule of glucose into two molecules of a 3C compound.State(i) the name given to these initial sta...

2010 Summer

Theory

CH12 - ENERGY AND RESPIRATION

Fig. 7.1 is an outline diagram of the Krebs cycle. A two carbon acetyl group enters the cycle by combining with a molecule of oxaloacetate. A molecule...

2010 Summer

Theory

CH12 - ENERGY AND RESPIRATION

(a) (i) Explain what is meant by the following terms:decarboxylation ....................................................................................

2010 Summer

Theory

CH12 - ENERGY AND RESPIRATION

Rice, *Oryza sativa*, is a staple food in many parts of the world. Rice is often grown in fields that are flooded with water for part of the growing s...

2010 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) Outline the need for energy in living organisms using named examples. [9](b) Explain the different energy values of carbohydrate, lipid and protei...

2010 Winter

Theory

CH12 - ENERGY AND RESPIRATION

Rice, Oryza sativa, is a staple food in many parts of the world. Rice is often grown in fields that are flooded with water for part of the growing s...

2010 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) Outline the need for energy in living organisms using named examples. [9](b) Explain the different energy values of carbohydrate, lipid and protei...

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