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Chapter 3/4 of Bio

Biological Molecules

QuestionAnswer
State the role of water in living organisms Hydrolysis of starch, fats, protein, solvent for chemical process, regulate body temperature, to transport dissolved substances, raw materials for photosynthesis and to keep plants turgid.
List the elements which make up carbohydrates, proteins and fats Carbon, Hydrogen and Oxygen
Explain enzyme action in terms of the 'lock and key' hypothesis The active site of the enzyme behaves like a 'lock' which only one particular substrate, the 'key' can fit into the active site
Explain the effects of temperature and pH on the rate of enzyme catalysed reactions
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