Enzymes can be described as biological catalysts that regulate the rate of chemical reactions involved in biological processes. Different types of chemical
reactions are catalysed by different classes of enzyme. Using a variety of examples, describe and discuss some of the chemical reactions that enzymes
facilitate in photosynthesis and cellular respiration.
In your introductory paragraph(s) you might give a brief overview of what an enzyme is. What type of molecules are enzymes? Where are they found? How do
they work? What are their limitations?
The focus of this essay should be about the chemical reactions. Try to identify different types of chemical reactions e.g., oxidation, reduction, addition,
substitution, phosphorylation etc. and relate these to the specific enzymes, and classes of enzymes, that catalyse these reactions in cells.
The question directs you to consider two key metabolic processes: photosynthesis and cellular respiration. Make sure that you include examples from both.
It is recommended that you use plenty of clearly labelled and referenced diagrams and figures to support your writing. A good essay will also include a clear
thesis statement and supporting conclusion.
