Topic 2 - Molecular biology
Question 1
HLPaper 1Water has a specific heat capacity of 4.2 J g–1 K–1 at room temperature, a latent heat of vaporization equal to 2257 J g–1, and a boiling point of 100 °C. What are the specific heat capacity, latent heat of vaporization and boiling point of methane?
Question 2
SLPaper 2Outline reasons for the therapeutic use of stem cells.
Describe how leaf cells make use of light energy.
Explain how cells and cell components in the blood defend the body against infectious disease.
Question 3
HLPaper 1The dashed line shows the relationship between the activity of an enzyme and the concentration of its substrate. Which curve shows the effect of a non-competitive inhibitor on this relationship?
Question 4
SLPaper 1What is the relative wavelength in the visible spectrum of red light and blue light and are these colours absorbed or reflected by chlorophyll?
Question 5
SLPaper 2Describe briefly the endosymbiotic theory.
Outline how photosynthesis produces glucose.
Discuss the control of blood glucose levels and the consequences if they are not maintained.
Question 6
HLPaper 1Which protein is identified with its function?
Question 7
SLPaper 1The graph shows the results of an investigation into the activity of turnip peroxidase. The accumulation of the product of the reaction catalysed by the enzyme is shown at different pH values.
Based on the data in the graph, what is most probably the optimum pH for turnip peroxidase?
Question 8
SLPaper 1The diagram represents transcription and translation.
What structures do the letters X and Y represent?
Question 9
HLPaper 2The figure shows a tripeptide.
Label one peptide bond in this molecule.
Describe the secondary structure of proteins.
Outline the action taken by the diaphragm during inhalation.
Question 10
SLPaper 2Outline the structure of proteins.
Cells produce a large variety of proteins with different sequences of amino acids. Explain how this is done.
Outline the range of functions of proteins in cells.
