Text: Question 3
(20 Marks)
The structure of proteins is described at four levels: primary, secondary, tertiary, and quaternary. Briefly explain what is referred to by each of these terms. Why are these distinctions useful? [5 marks]
Each level of protein structure is stabilized by chemical bonds and interactions. List the bonds and/or effects primarily responsible for stabilizing each level of structure. [5 marks]
The illustration below shows a molecule of hemoglobin. Describe TWO (2) aspects of hemoglobin STRUCTURE that are important for its FUNCTION in transporting oxygen around the body. Explain how each structural feature is required for the function of hemoglobin. [10 marks]