Practice IB Biology Topic 2.4 Proteins with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 2.4 Proteins and mirrors Paper 1A, 1B, 2 style where relevant.
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Glucose and galactose are examples of monosaccharides. State one other example of a monosaccharide.
There are several different types of carbohydrate. State which type of carbohydrate lactose is.
State the type of chemical reaction that occurs when lactose is digested into glucose and galactose.
Lactase is widely used in food processing. Explain three reasons for converting lactose to glucose and galactose during food processing.
Simple laboratory experiments show that when the enzyme lactase is mixed with lactose, the initial rate of reaction is highest at 48°C. In food processing, lactase is used at a much lower temperature, often at 5°C. Suggest reasons for using lactase at relatively low temperatures.
Outline the first three levels of protein structure, including the types of bonding within each and the significance of each level.
Using a table, compare competitive and non-competitive inhibition and give one named example of each.
Explain the production of antibodies.
The graph shows the results of an investigation into the activity of a fungal protease enzyme. The accumulation of the product of the reaction catalysed by the enzyme is shown over time at different pH values.
Assume time and concentration are in arbitrary units.
What is the most probable optimum pH for this fungal protease?
Describe the genetic code and its relationship to polypeptides and proteins.
Outline the role of proteins in active and passive transport of molecules through membranes.
Many cell functions, like synthesis of macromolecules and transport, require energy in the form of ATP. Explain how ATP is generated in animal cells.
How is the sequence of DNA conserved?