Complete the sentences to describe enzymes. Choose words or phrases from the list. Each word or phrase can be used once, more than once, or not at all. amino acids, calcium, carbon, fatty acids, hydrogen, iron, magnesium, molecules, nitrogen, oxygen, water Enzymes are proteins. All proteins are built from a chain of smaller [BLANK] called [BLANK]. All proteins contain the chemical elements [BLANK], [BLANK], [BLANK] and [BLANK].
Enzymes act as biological catalysts. Describe what is meant by the term catalyst.
Fig. 1.1 shows a reaction catalysed by an enzyme. The labels on Fig. 1.1 include: enzyme and substrate. Use Fig. 1.1 to describe enzyme action.
From the information in Fig. 1.2, identify the optimum temperature for this enzyme.
Identify the temperature when the enzyme is fully denatured. Explain how you decided on your answer.
Calculate the difference in enzyme activity between 20 ^{\circ}C and 40 ^{\circ}C.
On Fig. 1.2, sketch the curve showing the activity of an enzyme found in humans.