Practice IB Biology Topic 2.5 Enzymes with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 2.5 Enzymes and mirrors Paper 1A, 1B, 2 style where relevant.
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Which of the following statements about enzyme activity is correct?
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.
In an experiment the effect of changing pH on an enzymatic reaction is tested. Which could be a dependent variable in this kind of experiment?
The graph displays the relationship between the concentration of a substrate and the initial rate of an enzyme-catalysed reaction.
Which of the following best explains why the rate of reaction reaches a plateau ()?